Update sphinx.yml

Add dispatch on workflow

Author: quentinhaenn

.github/workflows/sphinx.yml

@@ -8,6 +8,7 @@ on:
     paths:
       - "docs/**"
       - "src/radius_clustering/**"
+  workflow_dispatch:
 
 jobs:
   build:
@@ -36,4 +37,4 @@ jobs:
       if: github.ref == 'refs/heads/main'
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
-        publish_dir: docs/build/html
+        publish_dir: docs/build/html