[CDAPI-78]: Increased schema validation tests timeout to 10 minutes

Author: nhsd-jack-wainwright

.github/workflows/stage-2-test.yaml

@@ -94,7 +94,7 @@ jobs:
   test-schema:
     name: "Schema validation tests"
     runs-on: ubuntu-latest
-    timeout-minutes: 5
+    timeout-minutes: 10
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v6