[23098] Update RELEASE_SUPPORT with release 2.2.1 (backport #271)

[mergify[bot]]

Description

@Mergifyio backport 2.3.x

Contributor Checklist

• [x] Commit messages follow the project guidelines.
• N/A Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally
• N/A Changes are API compatible.
• [x] Applicable backports have been included in the description.

Reviewer Checklist

• [x] The PR has a milestone assigned.
• [x] The title and description correctly express the PR's purpose.
• N/A Check contributor checklist is correct.
• N/A Check CI results: changes do not issue any warning.
• N/A Check CI results: failing tests are unrelated with the changes.

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This is an automatic backport of pull request #271 done by [Mergify](https://mergify.com).