Fixes depth (#3555)

.github/workflows/check-if-ui-has-changed.yml

@@ -22,7 +22,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           ref: ${{ github.event.pull_request.head.sha }} # So we can test on forks
-          fetch-depth: 2
+          fetch-depth: 0
       - name: Install dependencies
         run: yarn
         # 👇 Adds Chromatic as a step in the workflow