Build/Test Tools: Update 3rd party actions.

This updates the following 3rd party actions:

- `actions/setup-node` from `4.2.0` to `4.3.0`
- `actions/upload-artifact` from `4.6.0` to `4.6.1`
- `ramsey/composer-install` from `3.0.0` to `3.1.0`
- `actions/cache` from `4.2.0` to `4.2.2`
- `actions/download-artifact` from `4.1.8` to `4.1.9`
- `codecov/codecov-action` from `5.3.1` to `5.4.0`

See #62221.
Built from https://develop.svn.wordpress.org/trunk@60051


git-svn-id: http://core.svn.wordpress.org/trunk@59387 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.8-beta3-60050';
+$wp_version = '6.8-beta3-60051';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.