Merge pull request #267 from PHPCSStandards/feature/ghactions-tweak-security-check

GH Actions/securitycheck: only run against PHP 5.4

Author: jrfnl

.github/workflows/securitycheck.yml

@@ -23,7 +23,7 @@ jobs:
 
     strategy:
       matrix:
-        php: ['5.4', 'latest']
+        php: ['5.4']
 
     steps:
       - name: Checkout code