ci(pull-request): setup-opa@v1 -> setup-opa@v2 (open-policy-agent#5302)

Resolves open-policy-agent/setup-opa#18 for the usage in this repo.

Signed-off-by: Stephan Renatus <[email protected]>

Author: srenatus

.github/workflows/pull-request.yaml

@@ -317,7 +317,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Download OPA
-        uses: open-policy-agent/setup-opa@v1
+        uses: open-policy-agent/setup-opa@v2
         with:
           version: edge