ci(phpunit): Thin out DB matrix

Signed-off-by: Joas Schilling <coding@schilljs.com>

.github/workflows/phpunit-mysql.yml

@@ -60,7 +60,7 @@ jobs:
       fail-fast: false
       matrix:
         php-versions: ['8.2']
-        mysql-versions: ['8.0', '8.4']
+        mysql-versions: ['8.0']
         include:
           - mysql-versions: '8.0'
             php-versions: '8.3'

.github/workflows/phpunit-oci.yml

@@ -64,8 +64,6 @@ jobs:
             php-versions: '8.2'
             coverage: ${{ github.event_name != 'pull_request' }}
           - oracle-versions: '21'
-            php-versions: '8.2'
-          - oracle-versions: '23'
             php-versions: '8.3'
           - oracle-versions: '23'
             php-versions: '8.4'

.github/workflows/phpunit-pgsql.yml

@@ -61,7 +61,7 @@ jobs:
       matrix:
         php-versions: ['8.2']
         # To keep the matrix smaller we ignore PostgreSQL versions in between as we already test the minimum and the maximum
-        postgres-versions: ['14', '18']
+        postgres-versions: ['14']
         include:
           - php-versions: '8.3'
             postgres-versions: '18'