Upgrade to actions/checkout@v6

Author: felipe-iar

.github/workflows/arm.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/iarsystems/arm:9.70.4-st
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Check compiler version
         run: iccarm --version
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/iarsystems/arm:9.70.4-st
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: C-STAT - Library
         run: |
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/iarsystems/arm:9.70.4-st
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Download library
         uses: actions/download-artifact@v8
         with:
@@ -90,7 +90,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/iarsystems/arm:9.70.4-st
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Static Analysis
         run: |
           iarbuild project/EWARM/project.ewp -cstat_analyze Debug -log all