Gracefully handle the collaborator missing error

[samirsilwal]

Changes

• Wrap the collaborator review request API call with try catch
• Just log the error instead of failing the action status
• It creates the PR despite before but the action run status is set to error which is a bit annoying. So, error info is shown instead which gives info about the handling

Test

• Messages shown when error

Before

https://github.com/samirsilwal/sync-branches/actions/runs/11310223756/job/31455026490

After