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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
         uses: actions/checkout@v6
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: |
             innei/mx-server

.github/workflows/release.yml

@@ -104,7 +104,7 @@ jobs:
 
       - name: Metadata
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ${{ env.IMAGE }}
 
@@ -185,7 +185,7 @@ jobs:
 
       - name: Metadata
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ${{ env.IMAGE }}
           tags: |