workflows: Address old Linux error for libc

Signed-off-by: Hiroshi Hatake <[email protected]>

.github/workflows/build.yaml

@@ -7,6 +7,7 @@ on:
     branches:
       - master
     types: [opened, reopened, synchronize]
+
 jobs:
   build-windows:
     name: Build sources on amd64 for ${{ matrix.os }}
@@ -57,6 +58,9 @@ jobs:
     name: CentOS 7 build to confirm no issues once used downstream
     runs-on: ubuntu-latest
     container: centos:7
+    env:
+      # workaround required for checkout@v3, https://github.com/actions/checkout/issues/1590
+      ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
     steps:
       - name: Set up base image dependencies
         run: |