Add workflow_dispatch trigger to nightly release

Author: cx-anurag-dalke

.github/workflows/nightly.yml

@@ -1,6 +1,7 @@
 name: Nightly Release
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - main
@@ -22,4 +23,4 @@ jobs:
     with:
       tag: ${{ needs.set_tag.outputs.tag_name }}
       rchannels: "nightly"
-    secrets: inherit
+    secrets: inherit