ci: Allow triggering workflows manually

Author: sonnyp

.github/workflows/CI.yaml

@@ -5,6 +5,7 @@ name: CI
 on:
   pull_request:
     branches: [main]
+  workflow_dispatch:
 
 jobs:
   CI:

.github/workflows/deploy.yaml

@@ -1,7 +1,10 @@
+name: Deploy
+
 on:
   push:
     branches: [main]
-name: Deploy
+  workflow_dispatch:
+
 jobs:
   flatpak:
     name: "Flatpak"