Update dependency pytest-cov to v6.2.1

Author: elastic-renovate-prod[bot]

requirements.txt

@@ -9,7 +9,7 @@ types-protobuf==5.28.3.20241203
 # dev
 ruff==0.12.1
 pytest==8.4.1
-pytest-cov==6.1.1
+pytest-cov==6.2.1
 pytest-asyncio==1.0.0
 pytest-mock==3.14.1
 pytest-randomly==3.16.0