fix: link to CODE_OF_CONDUCT.md in README is busted

Author: beckermr

README.md

@@ -2,7 +2,7 @@
 
 **JAX port of GalSim, for parallelized, GPU accelerated, and differentiable galaxy image simulations.**
 
-[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg)](code_of_conduct.md) [![Python package](https://github.com/GalSim-developers/JAX-GalSim/actions/workflows/python_package.yaml/badge.svg)](https://github.com/GalSim-developers/JAX-GalSim/actions/workflows/python_package.yaml) [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff) [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/GalSim-developers/JAX-GalSim/main.svg)](https://results.pre-commit.ci/latest/github/GalSim-developers/JAX-GalSim/main) [![CodSpeed Badge](https://img.shields.io/endpoint?url=https://codspeed.io/badge.json)](https://codspeed.io/GalSim-developers/JAX-GalSim)
+[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg)](CODE_OF_CONDUCT.md) [![Python package](https://github.com/GalSim-developers/JAX-GalSim/actions/workflows/python_package.yaml/badge.svg)](https://github.com/GalSim-developers/JAX-GalSim/actions/workflows/python_package.yaml) [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff) [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/GalSim-developers/JAX-GalSim/main.svg)](https://results.pre-commit.ci/latest/github/GalSim-developers/JAX-GalSim/main) [![CodSpeed Badge](https://img.shields.io/endpoint?url=https://codspeed.io/badge.json)](https://codspeed.io/GalSim-developers/JAX-GalSim)
 
 **Disclaimer**: This project is still in an early development phase, **please use the [reference GalSim implementation](https://github.com/GalSim-developers/GalSim) for any scientific applications.**