Merge pull request #5 from waywardmonkeys/ci-update-actions

ci: Update to `actions/checkout@v4` from `v3`.

Author: eliemichel

.github/workflows/cmake.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - if: ${{ matrix.install-deps }}
       name: Install dependencies