.github: Add workflow_dispatch trigger for CI jobs

Allow users to trigger CI run manually in their own tree without
touching master branch.

Signed-off-by: Jiaxun Yang <[email protected]>

Author: FlyGoat

.github/workflows/linux.yml

@@ -7,6 +7,7 @@ on:
   pull_request:
     branches:
       - main
+  workflow_dispatch:
 
 # When a PR is updated, cancel the jobs from the previous version. Merges
 # do not define head_ref, so use run_id to never cancel those jobs.

.github/workflows/zephyr.yml

@@ -7,6 +7,7 @@ on:
   pull_request:
     branches:
       - main
+  workflow_dispatch:
 
 # When a PR is updated, cancel the jobs from the previous version. Merges
 # do not define head_ref, so use run_id to never cancel those jobs.