Consolidate on env.PR_NUMBER in pr_opened workflow

Author: Yoshanuikabundi

.github/workflows/cookbook_pr_opened.yaml

@@ -34,12 +34,9 @@ jobs:
       - name: Copy cache from main to PR branch
         id: copyCache
         run: |
-          echo github.event.inputs.pr_number=${{ github.event.inputs.pr_number }}
-          echo env.PR_NUMBER=${{ env.PR_NUMBER }}
-          echo PR_NUMBER=$PR_NUMBER
           git config user.name github-actions
           git config user.email [email protected]
-          git push origin HEAD:_cookbook_data_PR${PR_NUMBER}
+          git push origin HEAD:_cookbook_data_PR${{ env.PR_NUMBER }}
 
       - name: Add descriptive comment to PR
         uses: thollander/actions-comment-pull-request@v3