changelog for 6.3.1

[sl0thentr0py]

#skip-changelog

[sentry]

Bug: The CHANGELOG.md is updated to version 6.3.1, but the VERSION constant in sentry-ruby/lib/sentry/version.rb and related gems remains at 6.3.0.
_{Severity: HIGH}

Suggested Fix

To align the package version with the changelog, update the VERSION constant in sentry-ruby/lib/sentry/version.rb and all related gems (like sentry-sidekiq, sentry-resque, etc.) from "6.3.0" to "6.3.1".

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: CHANGELOG.md#L2

Potential issue: The pull request updates `CHANGELOG.md` to reflect version 6.3.1, but
the version constant `VERSION` in `sentry-ruby/lib/sentry/version.rb` and its dependent
gems is not updated from "6.3.0". The gem build process uses the `VERSION` constant from
`version.rb` to define the package version. This will result in a published gem with
version "6.3.0" whose changelog incorrectly describes changes for "6.3.1", leading to
user confusion and potential issues with automated release and dependency management
tools.

_{Did we get this right? 👍 / 👎 to inform future reviews.}