ci(pr): change main branch name from 'main' to 'v4' in workflow configuration

Author: manudeli

.github/workflows/pr.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Get base and head commits for `nx affected`
         uses: nrwl/[email protected]
         with:
-          main-branch-name: main
+          main-branch-name: v4
       - name: Run Tests
         run: pnpm run test:pr
       - name: Upload coverage to Codecov
@@ -82,7 +82,7 @@ jobs:
       - name: Get base and head commits for `nx affected`
         uses: nrwl/[email protected]
         with:
-          main-branch-name: main
+          main-branch-name: v4
       - name: Run Tests
         uses: nick-fields/[email protected]
         with: