update file path

Author: kaeizen

.github/workflows/playwright.yml

@@ -73,8 +73,7 @@ jobs:
       run: wp-env start
     - name: Create post with existing blocks
       run: |
-        cat e2e/config/post-content.txt
-        POST_ID=$(wp-env run tests-cli wp post create e2e/config/post-content.txt --post_title="Existing Blocks" --post_status=publish --porcelain)
+        POST_ID=$(wp-env run tests-cli wp post create plugins/Stackable/e2e/config/post-content.txt --post_title="Existing Blocks" --post_status=publish --porcelain)
         echo "WP_TEST_POSTID=$POST_ID" >> $GITHUB_ENV
       continue-on-error: true
     - name: Run playwright tests