Update ci.yml

.github/workflows/ci.yml

@@ -17,6 +17,10 @@ jobs:
   changes:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0  # OR "2" -> To retrieve the preceding commit.
+
       - name: Get changed files
         id: changed-files
         uses: tj-actions/changed-files@v36