chore(deps-ga): update GitHub Actions to v6

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -11,13 +11,13 @@ jobs:
     ruff-lint:
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v6
             -   uses: chartboost/ruff-action@v1
 
     ruff-format:
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v4
+            -   uses: actions/checkout@v6
             -   uses: chartboost/ruff-action@v1
                 with:
                     args: "format --diff"

.github/workflows/docker.yaml

@@ -23,7 +23,7 @@ jobs:
                     password: ${{ secrets.HARBOR_TOKEN }}
 
             -   name: Checkout code
-                uses: actions/checkout@v4
+                uses: actions/checkout@v6
 
             -   name: Build and push
                 uses: docker/build-push-action@v6

.github/workflows/docs.yaml

@@ -16,8 +16,8 @@ jobs:
     deploy:
         runs-on: ubuntu-latest
         steps:
-            -   uses: actions/checkout@v4
-            -   uses: actions/setup-python@v5
+            -   uses: actions/checkout@v6
+            -   uses: actions/setup-python@v6
                 with:
                     python-version: 3.x
             -   name: Cache virtualenv