build: fix timezone-update path references

Author: legendecas

.github/workflows/timezone-update.yml

@@ -57,7 +57,7 @@ jobs:
         with:
           author: Node.js GitHub Bot <github-bot@iojs.org>
           body: |
-            This PR was generated by tools/timezone-update.yml.
+            This PR was generated by `.github/workflows/timezone-update.yml` and `tools/update-timezone.mjs`.
 
             Updates the ICU files as per the instructions present in https://github.com/nodejs/node/blob/main/doc/contributing/maintaining/maintaining-icu.md#time-zone-data