Update pull-request.yml workflow to use check-version action

.github/workflows/pull-request.yml

@@ -34,15 +34,7 @@ jobs:
       - name: Ensure version parity
         run: lune run ensure-version-parity
 
-      - name: Ensure version has changed
-        run: |
-          current_version=$(jq -r .version package.json)
-          previous_version=$(git show origin/main:package.json | jq -r .version)
-
-          if [ "$current_version" == "$previous_version" ]; then
-            echo "Version has not changed"
-            exit 1
-          fi
+      - uses: kriasoft/check-version@v1
 
       - name: Ensure tests exist
         run: lune run ensure-tests src