Fix link to macOS badge

Change-Id: I95748c2abbd677160c69b424f8fbc3b15e17a641
diff --git a/README.md b/README.md
index a559fa5..7de8f0d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![Android](https://github.com/ceres-solver/ceres-solver/actions/workflows/android.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/android.yml)
 [![Linux](https://github.com/ceres-solver/ceres-solver/actions/workflows/linux.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/linux.yml)
-[![macOS](https://github.com/ceres-solver/ceres-solver/actions/workflows/macOS.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/macOS.yml)
+[![macOS](https://github.com/ceres-solver/ceres-solver/actions/workflows/macos.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/macos.yml)
 [![Windows](https://github.com/ceres-solver/ceres-solver/actions/workflows/windows.yml/badge.svg)](https://github.com/ceres-solver/ceres-solver/actions/workflows/windows.yml)
 
 Ceres Solver