Another fix for CI

Author: Ergus

.github/workflows/cmake.yml

@@ -25,7 +25,7 @@ jobs:
         #- {os: macos-latest, cc: "clang", cxx: "clang++"}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Prints
         run: |