Trigger builds from PAT submodule bumps and allow manual dispatch.

.gitea/workflows/build.yml

@@ -7,6 +7,7 @@ on:
       - dev
     tags:
       - 'v*'
+  workflow_dispatch:
 
 jobs:
   increment-version:

.gitea/workflows/update-submodule.yml

@@ -21,7 +21,9 @@ jobs:
         with:
           fetch-depth: 0
           submodules: false
-          token: ${{ secrets.GITHUB_TOKEN }}
+          # PAT so the submodule bump push can trigger build.yml
+          # (GITHUB_TOKEN pushes do not start new workflows).
+          token: ${{ secrets.ACTIONS_TOKEN }}
           ref: master
 
       - name: Update cinny submodule