chore(deps): update docker/metadata-action action to v6 (#9833)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/docker_build.yml

@@ -78,7 +78,7 @@ jobs:
 
       - name: Docker tag
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: meshtastic/meshtasticd
           tags: |

.github/workflows/docker_manifest.yml

@@ -146,7 +146,7 @@ jobs:
 
       - name: Docker meta (Debian)
         id: meta_debian
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: meshtastic/meshtasticd
           tags: |
@@ -167,7 +167,7 @@ jobs:
 
       - name: Docker meta (Alpine)
         id: meta_alpine
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: meshtastic/meshtasticd
           tags: |