chore(deps): update dependency isort to v8

Author: renovate-bot

pyproject.toml

@@ -39,7 +39,7 @@ Changelog = "https://github.com/googleapis/llama-index-cloud-sql-pg-python/blob/
 [project.optional-dependencies]
 test = [
     "black[jupyter]==26.1.0",
-    "isort==7.0.0",
+    "isort==8.0.0",
     "mypy==1.19.1",
     "pytest-asyncio==1.3.0",
     "pytest==8.4.2",