Found during #9288

Patch branch has # in it, so github action takes branch name and includes this into link.
Generated link looks like https://checkstyle-diff-reports.s3.us-east-2.amazonaws.com/Issue_#9271_2021125041/reports/diff/index.html, but it is incorrect(shows access denied) because # is a special sign.

Possible solutions - exclude hash sign from branch name or take hash from branch name and use it instead of branch name