chore(deps): bump Envoy from 1.22.2 to 1.22.7 (backport #5982)

[mergify]

This is an automatic backport of pull request #5982 done by Mergify.
Cherry-pick of 34c83fb has failed:

On branch mergify/bp/release-1.8/pr-5982
Your branch is up to date with 'origin/release-1.8'.

You are currently cherry-picking commit 34c83fbf1.
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  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
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	both modified:   mk/envoy.mk
	both modified:   tools/releases/version.sh

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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