Indent added if `---` is at top of yaml file (v0.26.1)

**To Reproduce**

With only the GitHub Actions extension enabled, If I paste in the following .yaml file:
```yaml
---
name: Example
# rest of file
```
the editor immediately reformats the pasted text as
```yaml
---
name: Example
# rest of file
```
When the extension is disabled, the pasted test is not indented after the `---` line.

If
```yaml
name: Example
# rest of file
```
is pasted, no extra indent is added.

**Expected behavior**

Pasted text is not indented

**Extension Version**
`v0.26.1`