chore(deps): update dependency pytest-cov to v7 (#338)

Co-authored-by: dishaprakash <57954147+dishaprakash@users.noreply.github.com>

Author: renovate-bot

pyproject.toml

@@ -47,7 +47,7 @@ test = [
     "mypy==1.17.1",
     "pytest-asyncio==0.26.0",
     "pytest==8.4.1",
-    "pytest-cov==6.2.1",
+    "pytest-cov==7.0.0",
     "langchain-tests==0.3.20",
     "langgraph==0.6.5"
 ]