Unable to add extension

### **This is autogenerated. Please review and update as needed.**

## Describe the bug

**Command Name**
`az extension add`

**Errors:**
```
The command failed with an unexpected error. Here is the traceback:
("Connection broken: ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None)", ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))
Traceback (most recent call last):
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\urllib3/response.py", line 438, in _error_catcher
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\urllib3/response.py", line 519, in read
File "http\client.py", line 455, in read
File "http\client.py", line 499, in readinto
File "socket.py", line 669, in readinto
File "ssl.py", line 1241, in recv_into
File "ssl.py", line 1099, in read
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/models.py", line 753, in generate
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\urllib3/response.py", line 576, in stream
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\urllib3/response.py", line 541, in read
File "contextlib.py", line 131, in __exit__
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\urllib3/response.py", line 455, in _error_catcher
urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None)", ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 231, in invoke
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 657, in execute
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 720, in _run_jobs_serially
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 691, in _run_job
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/__init__.py", line 328, in __call__
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/command_operation.py", line 121, in handler
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/extension/custom.py", line 16, in add_extension_cmd
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/extension/operations.py", line 328, in add_extension
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/extension/_resolve.py", line 64, in resolve_from_index
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/extension/_index.py", line 64, in get_index_extensions
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/extension/_index.py", line 47, in get_index
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/api.py", line 76, in get
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/api.py", line 61, in request
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/sessions.py", line 542, in request
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/sessions.py", line 677, in send
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/sessions.py", line 677, in
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/sessions.py", line 237, in resolve_redirects
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/sessions.py", line 697, in send
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/models.py", line 831, in content
File "D:\a\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\requests/models.py", line 756, in generate
requests.exceptions.ChunkedEncodingError: ("Connection broken: ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None)", ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

```

## To Reproduce:
Steps to reproduce the behavior. Note that argument values have been redacted, as they may contain sensitive information.

- _Put any pre-requisite steps here..._
- `az extension add --name {}`

## Expected Behavior

## Environment Summary
```
Windows-10-10.0.19041-SP0
Python 3.8.9
Installer: MSI

azure-cli 2.30.0

```
## Additional Context