refactor: lock poetry dependencies without updating (langflow-ai#3050)

Lock poetry dependencies without updating in the Makefile build_langflow target

(cherry picked from commit 340bfe2)

Author: ogabrielluiz

Makefile

@@ -249,7 +249,7 @@ build_langflow_backup:
 
 build_langflow:
 	cd ./scripts && poetry run python update_dependencies.py
-	poetry lock
+	poetry lock --no-update
 	poetry build
 ifdef restore
 	mv pyproject.toml.bak pyproject.toml