chore(deps): update docker/metadata-action action to v6

.gitea/workflows/release.yml

@@ -50,7 +50,7 @@ jobs:
           ref: main
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v4
+        uses: docker/setup-buildx-action@v3
 
       - name: Log in to Gitea Container Registry
         uses: docker/login-action@v4

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.23.4
+FROM alpine:3.23.3
 LABEL maintainer="Luke Tainton <luke@tainton.uk>"
 LABEL org.opencontainers.image.source="https://git.tainton.uk/repos/documize-docker"
 ARG DOCUMIZE_VERSION=v5.14.0