Issue Summary

pull request activity tab doesn't update the timestamp for the latest commit added to the source branch. 

Steps to Reproduce

1. Create a pull request.
2. Perform a commit on the source branch of the open PR.
3. Notice that the timestamp of the commit is not updating under the activity tab.
4. Perform another commit on the source branch of the open PR.
5. Again, observe that the timestamp of the commit is not updating under the activity tab.

Expected Results

The timestamp should change after adding a new commit to the source branch of the open pull request.

Actual Results

The timestamp remains the same in activity tab even after adding new commits, indicating that the updates are not reflected in the activity tab

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available