chore: Make analyses-snapshot-test PR titles usable as commit titles

[SyntaxColoring]

Overview

Something in our GitHub config changed recently where, when you click the green merge button on a PR like #14586, it autocompletes the commit message like this:

Evaluate Analyses Snapshot Update edge ([PR number])

We want it to autocomplete like this instead:

fix(app-testing): snapshot failure capture ([PR number])

Test Plan

None needed.

Changelog

• Change the titles of PRs created by the analyses-snapshot-test.yaml workflow, because they're used to autocomplete the squash commit message.

Review requests

None in particular.

Risk assessment

Low.

[sfoster1]

Oh, thanks! This was actually a change we made to make squash-merge outputs default to PR title, because

• This was actually always true for PRs with more than one commit
• But PRs with just one commit (as you noticed) would use the first line of that commit

So we would get a lot of merges that had bad titles. This way, as long as the PR title is ok, the commit will default to that.

This change looks good!