Fix errant comma after #125

Author: swissspidy

.github/workflows/reusable-testing.yml

@@ -195,12 +195,12 @@ jobs:
               "dbtype": "sqlite"
             },
             {
-              "php": "8,3",
+              "php": "8.3",
               "wp": "latest",
               "mysql": "mariadb-11.4"
             },
             {
-              "php": "8,3",
+              "php": "8.3",
               "wp": "trunk",
               "mysql": "mariadb-11.4"
             }