Tidy workflow

Author: James Page

.github/workflows/mysql-security-regression-test.yml

@@ -1,14 +1,12 @@
 name: mysql-security-regression-test
-
+on:
 jobs:
     name: security-regression-test
     runs-on: ubuntu-24.04
     strategy:
       matrix:
         ubuntu-base:
           - "ubuntu@24.04"
-#          - "ubuntu@22.04"
-#          - "ubuntu@20.04"
     steps:
       - name: Checkout
         uses: actions/checkout@v3