Update app.py

app.py

@@ -20,9 +20,9 @@ def visualize_github_repo(repo_name, repo_branch, mistral_api_key):
         GraphState,
     )
     
-    yield ("Looking at the Repo!", None)
+    yield "Looking at the Repo!"
     documents = load_github_codebase(repo_name, repo_branch)
-    yield ("Repo loaded!", None)
+    yield "Repo loaded!"
 
     # Define a new graph
     workflow = StateGraph(GraphState)