add back checkoutv3

Author: rohanku

.github/workflows/deploy-docs.yml

@@ -17,6 +17,7 @@ jobs:
     runs-on: bwrc
     environment: docs
     steps:
+      - uses: actions/checkout@v3
       - uses: superfly/flyctl-actions/setup-flyctl@ddcac349402ef55840d9870785f4df1890768078
       - run: just build
         working-directory: docs/api
@@ -33,6 +34,7 @@ jobs:
     runs-on: bwrc
     environment: docs
     steps:
+      - uses: actions/checkout@v3
       - uses: superfly/flyctl-actions/setup-flyctl@master
       - uses: actions/setup-node@v3
         with: