fix: downgrade back to allowing 12.14.1 to work

[michaelfig]

We didn't need to upgrade to 12.16.1, so let's move back to supporting 12.14.1.

Note that the 5 expected checks below have hardcoded the 12.16.1 in their test title in the branch protection rules. If this PR is merged, we will need to adjust the rules.

[warner]

Sounds good. Do you want me to disable the branch protection while you land this, and then switch it back on afterwards with the different test names?

[warner]

Oh, I see, the test names are descriptive outputs, not inputs.. we shouldn't need to modify the config.

[michaelfig]

Oh, I see, the test names are descriptive outputs, not inputs.. we shouldn't need to modify the config.

Not exactly sure what you mean. I had to modify the .github/workflows to use 12.14.1 instead of 12.16.1. I also had to modify the branch protection to use 12.x instead of 12.16.1.