ci: bump actions/checkout from 4 to 6 (#646)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/golangci-lint.yml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: '1.24'
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:

.github/workflows/pr-validation.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Setup go
       uses: actions/setup-go@v5
       with:

.github/workflows/security.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Go
         uses: actions/setup-go@v5