[Skiboot] [PATCH] ci: Update github actions to run on Node 20

[Reza Arbab]

Github is deprecating Node 16 for actions[1]. Update our workflow from
using actions/checkout at v3 to v4, which runs on Node 20.

[1] https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Signed-off-by: Reza Arbab <arbab at linux.ibm.com>
---
 .github/workflows/build-docs.yml           | 2 +-
 .github/workflows/docker-builds-checks.yml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
index f9c17499d913..eb93e1e99854 100644
--- a/.github/workflows/build-docs.yml
+++ b/.github/workflows/build-docs.yml
@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout at v3
+        uses: actions/checkout at v4
 
       - name: Install apt dependencies
         run: sudo apt-get update &&
diff --git a/.github/workflows/docker-builds-checks.yml b/.github/workflows/docker-builds-checks.yml
index dd1339cd75ee..a6e66147a840 100644
--- a/.github/workflows/docker-builds-checks.yml
+++ b/.github/workflows/docker-builds-checks.yml
@@ -15,7 +15,7 @@ jobs:
         os: [ ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, ubuntu-rolling, fedora39, fedora40, fedora-rawhide, docs ]
 
     steps:
-      - uses: actions/checkout at v3
+      - uses: actions/checkout at v4
 
       - name: Create Docker image
         run: |
-- 
2.43.5