test: Bump OPA to 1.12.3 (#671)

* test: Bump OPA to 1.12.3

* chore: Bump OPA to 1.12.3

Author: NickLarsenNZ

examples/hive-opa-cluster.yaml

@@ -61,7 +61,7 @@ metadata:
   name: opa
 spec:
   image:
-    productVersion: 1.12.2
+    productVersion: 1.12.3
   servers:
     config:
       logging:

tests/test-definition.yaml

@@ -44,7 +44,7 @@ dimensions:
       - 3.9.4
   - name: opa-latest
     values:
-      - 1.12.2
+      - 1.12.3
   - name: krb5
     values:
       - 1.21.1