actions/checkout no longer fails on ibm

Author: kddnewton

.github/workflows/main.yml

@@ -88,7 +88,7 @@ jobs:
           - ubuntu-24.04-s390x
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5 # v5 fails on these platforms
+    - uses: actions/checkout@v5
     - name: Set up Ruby
       run: |
         sudo apt-get update