Rename bake target

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

action.yml

@@ -26,7 +26,7 @@ inputs:
     description: 'Separator to use for labels output (default \n)'
     required: false
   bake-target:
-    description: 'Bake target name (default ghaction-docker-meta)'
+    description: 'Bake target name (default docker-metadata-action)'
     required: false
   github-token:
     description: 'GitHub Token as provided by secrets'