Update cmake.yml

actions/checkout@v4

Signed-off-by: Robin Davies <rerdavies@gmail.com>

.github/workflows/cmake.yml

@@ -5,20 +5,21 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
-
+    
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
 
 jobs:
   build:
+
     # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
     # You can convert this to a matrix build if you need cross-platform coverage.
     # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     
     - name: Install dependencies
       run: |