chore(ci): add workflow dispatch trigger

Author: ledif

.github/workflows/build-iso.yml

@@ -3,6 +3,7 @@ on:
   schedule:
     - cron:
         "00 10 * * 1" # build at 10:00 UTC every Monday
+  workflow_dispatch:
 
 jobs:
   iso:

.github/workflows/build.yml

@@ -15,8 +15,8 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
   cancel-in-progress: true
 jobs:
-  bluebuild:
-    name: Build Custom Image
+  build-image:
+    name: Build main image
     runs-on: ubuntu-latest
     permissions:
       contents: read