Suggestion: rename "Reject" to "Request changes" (or similar)

[InExtremaRes]

• Gitea version (or commit ref): d663930
  (rest is irrelevant)

Description

When reviewing a PR you can "Approve" or "Reject". The problem is that "Reject" sound too hard/rude and can hurt team relationship and confidence. Most of the time the PR is almost good but you are requesting some changes before merging, not rejecting the PR itself. GitHub, as an example, shows "Request changes" instead and I think it's a better name.

So, consider rename the "Reject" button and the "Someone rejected these changes" text to something like "Request changes" and "Someone requested changes".