Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Go
         uses: actions/setup-go@v6
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Go
         uses: actions/setup-go@v6

.github/workflows/docker.yaml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Check out
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0