CI i386: stick to v1 of actions/checkout

Author: andreasabel

.github/workflows/ci.yml

@@ -91,7 +91,7 @@ jobs:
         apt-get update -y
         apt-get install -y autoconf build-essential zlib1g-dev libgmp-dev curl
         curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 sh
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v1
     - name: Test
       run: |
         source ~/.ghcup/env