[CI skip] Update pascalgn/automerge-action action to v0.16.4

Author: renovate[bot]

.github/workflows/auto-squash.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
     - name: Auto squash
-      uses: pascalgn/[email protected].2
+      uses: pascalgn/[email protected].4
       env:
         GITHUB_TOKEN: ${{ secrets.ACCESS_TOKEN }}
         UPDATE_RETRIES: 0
@@ -42,7 +42,7 @@ jobs:
 
     steps:
     - name: Auto squash
-      uses: pascalgn/[email protected].2
+      uses: pascalgn/[email protected].4
       env:
         GITHUB_TOKEN: ${{ secrets.ACCESS_TOKEN }}
         UPDATE_RETRIES: 0