ci: roll back the version of checkout for "build (compat, ubuntu:18.04)"

With the change 28af8ed133ff15d50b5e2d644c6617d0a3e17033, we got the
following error at "Post repository checkout" stage on "build (compat, ubuntu:18.04)":

  Post job cleanup.
  /usr/bin/docker exec  94db032be2efb37ea68b3ce562ce52ba3dea047f5ac970aabb7fded075116c20 sh -c "cat /etc/*release | grep ^ID"
  /__e/node20/bin/node: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.28' not found (required by /__e/node20/bin/node)

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

diff --git a/.github/workflows/cibuild.yml b/.github/workflows/cibuild.yml
index f4f28e631088b28e987f87e0c524ecdf28506621..44985d9a162d2622566f9bd04a5081ffdb909df5 100644 (file)
--- a/.github/workflows/cibuild.yml
+++ b/.github/workflows/cibuild.yml
@@ -135,7 +135,7 @@ jobs:
       image: ${{ matrix.image }}
     steps:
       - name: Repository checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v1
       - name: Ubuntu setup
         run: .github/workflows/cibuild-setup-ubuntu.sh
       - name: Configure