Add Changelog updates for 2.1.3

[jhtimmins]

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^ Add meaningful description above

Read the Pull Request Guidelines for more information.
In case of fundamental code change, Airflow Improvement Proposal (AIP) is needed.
In case of a new dependency, check compliance with the ASF 3rd Party License Policy.
In case of backwards incompatible changes please leave a note in UPDATING.md.

[mik-laj]

Missing PR Number.

[potiuk]

Yeah - this one should go away, I think it relates to Breeze's SSH_PORT variable which does not go into those release notes :D

[potiuk]

I think some of those above qualify as "misc" (when they do not relate to airflow but add some explanation/clarifications/remove friction), on the other hand I think the "run mini-scheduler is a bugfix as it closes a bug when tasks were randomly killed by lack of heartbeat.

I'd qualify those as misc:

• Adds more explanatory message when SecretsMasker is not configured (Adds more explanatory message when SecretsMasker is not configured #17101)
• Better diagnostics and self-healing of docker-compose (Better diagnostics and self-healing of docker-compose #17484)
• Improve diagnostics message when users have secret_key misconfigured (Improve diagnostics message when users have secret_key misconfigured #17410)

[jhtimmins]

Thanks @mik-laj @potiuk, mind taking a look at my edits?

[github-actions]

The PR is likely ready to be merged. No tests are needed as no important environment files, nor python files were modified by it. However, committers might decide that full test matrix is needed and add the 'full tests needed' label. Then you should rebase it to the latest main or amend the last commit of the PR, and push it with --force-with-lease.