Revert ba8fa5c - Add PHP 8.4 back, it'll be our new minimum soon.

Author: dd32

.github/workflows/unit-tests.yml

@@ -55,7 +55,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['8.1', '8.5']
+        php-version: ['8.1', '8.4', '8.5']
 
     services:
       mysql: