Bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build_sdk.yml

@@ -25,7 +25,7 @@ jobs:
         overprovision-lvm: true
 
     - name: Check out code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Install Dependencies and Download SDK
       run: |

.github/workflows/eventbuild.yml

@@ -36,7 +36,7 @@ jobs:
         echo "$GITHUB_ENV"
        
     ### ONLY THIS RELEVANT FOR BUILDING ###
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: check for dev-release
       if: ${{ env.BRANCH == 'dev-release' || env.BRANCH == 'add-ramdisk' }}
       run: | 
@@ -159,7 +159,7 @@ jobs:
         echo "ARTIFACT_PREFIX=${ARTIFACT_PREFIX}" >> $GITHUB_ENV
       
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: dep
       run: sudo apt update && sudo apt-get install -y unzip curl git qemu qemu-user-static binfmt-support
@@ -229,7 +229,7 @@ jobs:
     - name: debug
       run: df -h
 
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - uses: actions/download-artifact@v4
       with:
@@ -306,7 +306,7 @@ jobs:
   #   - name: debug
   #     run: df -h
 
-  #   - uses: actions/checkout@v4
+  #   - uses: actions/checkout@v6
 
   #   - uses: actions/download-artifact@v4
   #     with: