Update asv badge url in README.md (#10113)

Author: sjvrijn

README.md

@@ -3,7 +3,7 @@
 [![CI](https://github.com/pydata/xarray/workflows/CI/badge.svg?branch=main)](https://github.com/pydata/xarray/actions?query=workflow%3ACI)
 [![Code coverage](https://codecov.io/gh/pydata/xarray/branch/main/graph/badge.svg?flag=unittests)](https://codecov.io/gh/pydata/xarray)
 [![Docs](https://readthedocs.org/projects/xray/badge/?version=latest)](https://docs.xarray.dev/)
-[![Benchmarked with asv](https://img.shields.io/badge/benchmarked%20by-asv-green.svg?style=flat)](https://pandas.pydata.org/speed/xarray/)
+[![Benchmarked with asv](https://img.shields.io/badge/benchmarked%20by-asv-green.svg?style=flat)](https://asv-runner.github.io/asv-collection/xarray/)
 [![Formatted with black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/python/black)
 [![Checked with mypy](http://www.mypy-lang.org/static/mypy_badge.svg)](http://mypy-lang.org/)
 [![Available on pypi](https://img.shields.io/pypi/v/xarray.svg)](https://pypi.python.org/pypi/xarray/)