Add release process to PR template

[jssblck]

Overview

Updates the PR template to show release instructions.

Checklist

• If I changed code, I ran yarn build and committed resulting changes.
• I added an example exercising this PRs functionality to .github/workflows/test.yml or explained why it doesn't make sense to do so.

[spatten]

Looks good!

I had a question about whether it makes sense to add instructions for creating $TAG, but it's not blocking

[spatten]

Is the tag in $TAG manually created too? If there is, let's add the instruction to create that tag here too. I'm guessing it's something like this:

git checkout master
export TAG=v1.2.3
git tag -a $TAG -m "Releases $TAG"
git push origin $TAG

If not, then ignore me :)

[jssblck]

Updated the directive- I just create the releases with the GitHub release UI since that also creates a tag.

[jssblck]

The tests are failing because there was no FOSSA analysis for the prior commit, and we can see that for some reason the GitHub workflow didn't run for the previous dependabot PR:

I don't see a reason this wouldn't work in the config, and from searching around it seems like some people say this sometimes "just happens" with auto merges? Seems suspicious but I'm going to force merge this PR in the hopes that is accurate.