fix: update PHP version and Magento version in compatibility matrix

Author: dermatz

.github/workflows/magento-compatibility.yml

@@ -16,9 +16,9 @@ jobs:
       matrix:
         include:
           - magento-version: "2.4.6-p14"
-            php-version: "8.3"
+            php-version: "8.2"
             search-engine-name: "opensearch"
-          - magento-version: "2.4.7-p6"
+          - magento-version: "2.4.7-p9"
             php-version: "8.3"
             search-engine-name: "opensearch"
           - magento-version: "2.4.8-p4"