ci: allow manual run of seo-production via workflow_dispatch

Author: ikidnapmyself

.github/workflows/ci.yml

@@ -3,6 +3,7 @@ name: CI
 on:
   push:
   pull_request:
+  workflow_dispatch:
 
 jobs:
   quality:
@@ -92,7 +93,7 @@ jobs:
           format: clover
 
   seo-production:
-    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    if: github.event_name == 'workflow_dispatch' || (github.event_name == 'push' && github.ref == 'refs/heads/master')
     runs-on: ubuntu-latest
 
     steps: