Add workflow_dispatch for syntactical correctness

Author: RitikaPahwa4444

.github/workflows/auto_assign.yml

@@ -1,5 +1,7 @@
-# Workflow disabled - comment out the trigger to prevent execution
-# on:
+# Automated runs commented out
+# Added workflow_dispatch temporarily for having a syntactically correct workflow file
+on:
+  workflow_dispatch:
 #   issue_comment:
 #     types: [created]
 
@@ -86,4 +88,4 @@ jobs:
                 issue_number: context.issue.number,
                 assignees: [context.actor]
               });
-            }
+            }