Add checkout

Author: cmichi

.github/workflows/submit-contract-sizes.yml

@@ -15,7 +15,7 @@ jobs:
     permissions:
       pull-requests: write
     runs-on: ubuntu-latest
-    timeout-minutes: 5
+    timeout-minutes: 10
     if: >
       github.event.workflow_run.event == 'pull_request' &&
         github.event.workflow_run.conclusion == 'success'
@@ -24,6 +24,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 100
+
       - name: Download Master Contract Sizes
         uses: ./.github/download-artifact
         with: