packages: bump iron ajax

pull-requests: don't report abort type of ajax requests as errors.

pull-requests: use proper validation of pull request title to prevent from bad errors.

ssh: update docs based on feedback.

ssh: add few explanation text about two step addition of generated keys. Based on feedback from customers.

integrations: reduce logging on override integration from warn to debug.

feed: fixed problem with 500 errors on rendering atom feed with diffs.

pull-requests: don't select first commit in case we don't get default branch. Loading compare from commit 0 to something selected is very heavy to compute. Instead force user to select the ref manually. ref #5414

tests: fixed tests for new source ref checking.

git: fix diff rendering with branches with '/'.