Use correct dependabot package ecosystem

Author: Firefishy

.github/dependabot.yml

@@ -1,5 +1,9 @@
 version: 2
 updates:
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "weekly"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:

.github/workflows/docker-publish.yml

@@ -17,8 +17,7 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  build:
-
+  container-build:
     runs-on: ubuntu-24.04
     permissions:
       contents: read