Add section to UpdatingMajorVersionAndTFM.md about marking APIs shipped

[wtgodbe]

No description provided.

[dougbu]

This looks fine so far but

1. Sentences mentioning RepoTasks as an exception are no longer correct
2. Suggest moving the template rebranding (precedence and identity updates) up into this section

[ghost]

Hey @dotnet/aspnet-build, looks like this PR is something you want to take a look at.

[captainsafia]

LGTM!

Side note: the list is getting long. I wonder if it would help with readability to have headings separating the major sections instead of using sub-bullets for each section.

[wtgodbe]

Sentences mentioning RepoTasks as an exception are no longer correct

This isn't true yet, it's still an exception until #45973 is done.

Suggest moving the template rebranding (precedence and identity updates) up into this section

Will do

[wtgodbe]

Actually, the precedence section can go away after #45995 is done, I'll leave it for now rather than splitting it into 2 sections (one for precedence, one for TFM) which should be redundant before 9

[wtgodbe]

#46173

[wtgodbe]

CI isn't reporting - @dotnet/dnceng is there a known outage right now?

Force-merging since this is just a change to a .md file.

[MattGal]

CI isn't reporting - @dotnet/dnceng is there a known outage right now?

Force-merging since this is just a change to a .md file.

There was some kind of GitHub degradation going on. Closing / reopening PRs seems to unblock it.

[ghost]

Hi @MattGal. It looks like you just commented on a closed PR. The team will most probably miss it. If you'd like to bring something important up to their attention, consider filing a new issue and add enough details to build context.