Update create_issue_if_referencemd_changes.yml

Upped the version to use node 16. Following warning from GH:
```
The following actions uses node12 which is deprecated and will be forced to run on node16: actions/setup-node@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/
```

.github/workflows/create_issue_if_referencemd_changes.yml

@@ -18,7 +18,7 @@ jobs:
           token: ${{ secrets.GENERIC_ACTION_REPO_SCOPE }} 
 
       - name: Use Node.js 16.x
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3.8.1
         with:
           node-version: '16.x'
 
@@ -108,4 +108,4 @@ jobs:
           title: ${{ steps.dates.outputs.today }} — ${{ steps.process_json.outputs.commits_length }} new commit(s) made to `reference.md` in Google Transit's repo
           body: |
             ${{ steps.process_json.outputs.extracted_data }}
-          assignees: ${{ steps.git-setup.outputs.assigned }}
+          assignees: ${{ steps.git-setup.outputs.assigned }}