Allow dispatching deployment tests manually

Author: swissspidy

.github/workflows/deployment.yml

@@ -1,6 +1,7 @@
 name: Deployment
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - main
@@ -195,7 +196,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [build, test]
 
-    if: ${{ github.repository_owner == 'wp-cli' }}
+    if: ${{ github.repository_owner == 'wp-cli' && github.event_name != 'workflow_dispatch' }}
     steps:
       - name: Check out builds repository
         uses: actions/checkout@v4
@@ -257,7 +258,7 @@ jobs:
   build-rpm: #-----------------------------------------------------------------------
     name: Build RPM package
     runs-on: ubuntu-latest
-    if: ${{ contains(github.ref, 'release') && github.repository_owner == 'wp-cli' }}
+    if: ${{ contains(github.ref, 'release') && github.repository_owner == 'wp-cli' && github.event_name != 'workflow_dispatch' }}
     needs: [deploy]
 
     steps:
@@ -311,7 +312,7 @@ jobs:
   build-deb: #-----------------------------------------------------------------------
     name: Build DEB package
     runs-on: ubuntu-latest
-    if: ${{ contains(github.ref, 'release') && github.repository_owner == 'wp-cli' }}
+    if: ${{ contains(github.ref, 'release') && github.repository_owner == 'wp-cli' && github.event_name != 'workflow_dispatch' }}
     needs: [build-rpm]
 
     steps: