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] <support@github.com>

Author: dependabot[bot]

.github/workflows/build_ezbake.yml

@@ -55,7 +55,7 @@ jobs:
           ref: ${{ inputs.branch }}
 
       - name: Checkout platform config
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: OpenVoxProject/shared-actions
           ref: main

.github/workflows/build_ezbake_fips.yml

@@ -52,7 +52,7 @@ jobs:
           ref: ${{ inputs.branch }}
 
       - name: Checkout platform config
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: OpenVoxProject/shared-actions
           ref: main

.github/workflows/build_vanagon.yml

@@ -46,7 +46,7 @@ jobs:
       build_matrix: ${{ steps.set-matrix.outputs.build_matrix }}
     steps:
       - name: Checkout platform config
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: OpenVoxProject/shared-actions
           ref: main