chore(deps): update davidanson/markdownlint-cli2-action action to v21

.gitea/workflows/markdown-linters.yaml

@@ -14,6 +14,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6.0.1
-    - uses: DavidAnson/markdownlint-cli2-action@v20.0.0
+    - uses: DavidAnson/markdownlint-cli2-action@v21.0.0
       with:
         globs: '**/*.md'

.gitea/workflows/release.yaml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/setup-go@v6.1.0
       with:
         go-version: stable
-    - uses: docker/login-action@v4.1.0
+    - uses: docker/login-action@v3.6.0
       with:
         registry: git.cryptic.systems
         username: ${{ github.repository_owner }}