Build/Test Tools: Update 3rd party GitHub Actions.

This updates the following GitHub Actions:
- `actions/upload-artifact` from `4.6.1` to `4.6.2`
- `actions/download-artifact` from `4.1.9` to `4.2.1`
- `actions/cache` from `4.2.2` to `4.2.3`

Though these are minor updates, they include a hardening change, switching to masking cache entry tokens in debug logs.

Fixes #62221.
Built from https://develop.svn.wordpress.org/trunk@60083


git-svn-id: http://core.svn.wordpress.org/trunk@59419 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.8-beta3-60082';
+$wp_version = '6.8-beta3-60083';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.