fix finding the transformers path

app.py

@@ -741,7 +741,7 @@ app = Flask(__name__)
 # Dynamically find the transformers installation directory
 
 transformers_path = os.path.dirname(transformers.__file__)
-docs_dir = os.path.join(transformers_path, "..", "docs", "source", "en", "model_doc")
+docs_dir = os.path.join(transformers_path, "docs", "source", "en", "model_doc")
 docs_dir = os.path.abspath(docs_dir)
 parser = TransformersTimelineParser(docs_dir)