Fix wrong lintrunner version (#87295)
The syntax is invalid for pip. I missed this a while back:
```
Run pip install -r .github/requirements-gha-cache.txt
ERROR: Invalid requirement: 'lintrunner=0.9.2' (from line 11 of .github/requirements-gha-cache.txt)
Hint: = is not a valid operator. Did you mean == ?
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87295
Approved by: https://github.com/ZainRizvi
