Small fixes to actions and release script

[gikaragia]

Changes Proposed in this Pull Request

• Updates actions/checkout to v4 to avoid some warnings
• Adds a default release note 'Updated plugin headers' when the release notes are empty.

Testing Instructions

• You can run the script locally to test
• Or alternatively you can check Release WP Job Manager 3.0.0 #2648 to see for the result of running the script.

[jgcaruso]

Changelog generation code looks good 👍

I'm not entirely sure what the actions/checkout@v4 is so I'm reluctant to approve the PR. Hoping someone else familiar with the release script can look at it.

Also, when running the release script I got the following error, but it also happened on Trunk so I think it might just be my environment and not this PR.

[gikaragia]

Thank you for taking a look @jgcaruso!

I got the following error,

Tried it again and it didn't happen. I would start debugging by running the pot build command individually: npm run i18n:build

I'm not entirely sure what the actions/checkout@v4 is

This action checks out the code. It's a common first step before doing the rest of the stuff like building, running tests etc.
The version upgrade should be backwards compatible. I did the update because v2 uses node 12 IIRC and this version is deprecated by Github. So it just uses node 16 anyway and prints a warning. I did a similar change for wpjm-addons here.

[jgcaruso]

I would start debugging by running the pot build command individually: npm run i18n:build

So running that gives me wp: command not found

This is probably just because I'm a fresh install (and maybe didn't real all of the documentation 😅 ), but I wonder if some dependencies should be added, and maybe the i18n:build should be part of the release? Or is it mentioned as a pre-release step in some release documentation, so it doesn't need to be automated?

This action checks out the code. It's a common first step before doing the rest of the stuff like building, running tests etc.

Oh so its a github actions specific thing? Cool!

[gikaragia]

Ah yes @jgcaruso! You need WP-cli to be installed and globally available for this command to run. I'll add this to the release documentation.

[jgcaruso]

Tested well!

Once I installed wp-cli globally and ran composer install the release script worked and created the release PR #2656