Fix TF 2.7 release notes

[nouiz]

Fix #52670. The changes is in TF2.7 and not 2.6.

@mihaimaruseac

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[nouiz]

@googlebot I consent.

I already have the CLA signed. I'm not sure why this was asked.

[mihaimaruseac]

CLA bot is confused when doing cherrypicks.

There's a caveat here, we'll add a new commit on the branch after the release, but probably we can handle this the same as #52971

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[nouiz]

CLA bot is confused when doing cherrypicks.

I didn't cherry-pick anything here.

There's a caveat here, we'll add a new commit on the branch after the release, but probably we can handle this the same as #52971

Can you confirm that, I need to do this commit on top of master and not on the release branch? I updated this PR to do this. I changed the RELEASE.md files instead of README.md.

[google-cla]

All (the pull request submitter and all commit authors) CLAs are signed, but one or more commits were authored or co-authored by someone other than the pull request submitter.

We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that by leaving a comment that contains only @googlebot I consent. in this pull request.

Note to project maintainer: There may be cases where the author cannot leave a comment, or the comment is not properly detected as consent. In those cases, you can manually confirm consent of the commit author(s), and set the cla label to yes (if enabled on your project).

ℹ️ Googlers: Go here for more info.

[mihaimaruseac]

So we need one PR against the r2.7 branch and one against master. This way we ensure that the relnotes on the branch are always a subset of what's on master, each section matching.

After the r2.7 branch PR lands I will update the GitHub release notes to match.

[nouiz]

Ok. So I updated this PR to be as at the start to modify only the 2.7 branch.

@googlebot I consent.
My commit use an email that is in my github account. So it should works as before.
But my commit name is "Frederic Bastien", while my github account name is "Frédéric Bastien". There is some special character that I converted in the github commit. Can Google bot started to check the name? If so, I'll check if I can use the special character in my github commit.

[ratan]

Looks good