Conda nightlies failing on bad credentials

### Describe the bug, including details regarding any error messages, version, and platform.

I was trying to use conda to try out the new float16 support in Parquet, but wasn't able to get Conda to download a recent enough version of PyArrow nightlies. It turns out they seem to be failing on upload due to bad credentials:

https://dev.azure.com/ursacomputing/crossbow/_build/results?buildId=59190&view=logs&j=cf796865-97b7-5cd1-be8e-6e00ce4fd8cf&t=d5062407-4aaa-5468-7238-c199647c44e2

```
Starting: Upload packages as a GitHub release
==============================================================================
Task : Bash
Description : Run a Bash script on macOS, Linux, or Windows
Version : 3.231.5
Author : Microsoft Corporation
Help : https://docs.microsoft.com/azure/devops/pipelines/tasks/utility/bash
==============================================================================
Generating script.
========================== Starting Command Output ===========================
/bin/bash /Users/runner/work/_temp/586b44a1-da5f-4e9b-b922-cdb906ca3dbf.sh
Traceback (most recent call last):
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/bin/archery", line 8, in
sys.exit(archery())
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/click/core.py", line 1157, in __call__
return self.main(*args, **kwargs)
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/click/core.py", line 1078, in main
rv = self.invoke(ctx)
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/click/core.py", line 1688, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/click/core.py", line 1688, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/click/core.py", line 1434, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/click/core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/click/decorators.py", line 45, in new_func
return f(get_current_context().obj, *args, **kwargs)
File "/Users/runner/work/1/s/arrow/dev/archery/archery/crossbow/cli.py", line 547, in upload_artifacts
queue.github_overwrite_release_assets(
File "/Users/runner/work/1/s/arrow/dev/archery/archery/crossbow/core.py", line 551, in github_overwrite_release_assets
repo = self.as_github_repo()
File "/Users/runner/work/1/s/arrow/dev/archery/archery/crossbow/core.py", line 463, in as_github_repo
self._github_repo = github.repository(username, reponame)
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/github3/github.py", line 2103, in repository
json = self._json(self._get(url), 200)
File "/Users/runner/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/github3/models.py", line 161, in _json
raise exceptions.error_for(response)
github3.exceptions.AuthenticationFailed: 401 Bad credentials
```

cc @raulcd

### Component(s)

Continuous Integration