make upload_checksums optional

Signed-off-by: Rajat Jindal <[email protected]>

Author: rajatjindal

action.yml

@@ -5,6 +5,9 @@ inputs:
   template_file:
     required: false
     description: 'the plugin template file'
+  upload_checksums:
+    required: false
+    description: 'if enabled, uploads a checksums-<tagname>.txt file to release'
   github_token:
     required: false
     description: 'github token used for downloading artifacts to render template'