Update checkout action

Author: felipe-iar

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
     container: ghcr.io/iarsystems/arm
     steps:
     - name: Checkout project
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: CMake - Configure
       working-directory: tutorial

.github/workflows/codeql.yml

@@ -30,7 +30,7 @@ jobs:
       packages: read
     steps:
     - name: Checkout project
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: IAR C-STAT Static Analysis
       working-directory: tutorial