Update https://git.quad4.io/actions/checkout action to v6

.gitea/workflows/docker.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: https://git.quad4.io/actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: https://git.quad4.io/actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
       - name: Set up QEMU
         uses: https://git.quad4.io/actions/setup-qemu-action@3a1695b1353f9f8868722ffaafc1f164ef35fa5e # v3
@@ -55,7 +55,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build
-        uses: https://git.quad4.io/actions/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6
+        uses: https://git.quad4.io/actions/build-push-action@dc0c2d97df39a6939d9db7d572445529e2365ec6 # v6
         with:
           context: .
           file: ./docker/Dockerfile
@@ -81,7 +81,7 @@ jobs:
             type=sha,format=short,suffix=-rootless
 
       - name: Build and push rootless Docker image
-        uses: https://git.quad4.io/actions/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6
+        uses: https://git.quad4.io/actions/build-push-action@dc0c2d97df39a6939d9db7d572445529e2365ec6 # v6
         with:
           context: .
           file: ./docker/Dockerfile.rootless

.gitea/workflows/publish.yml

@@ -27,7 +27,7 @@ jobs:
       contents: read
     steps:
     - name: Checkout
-      uses: https://git.quad4.io/actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      uses: https://git.quad4.io/actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
       with:
         persist-credentials: false
     - name: Set up Python

.gitea/workflows/safety.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: https://git.quad4.io/actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: https://git.quad4.io/actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
       - name: Set up Python
         uses: https://git.quad4.io/actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v5
         with: