Increase the number of macos_arm64 machines (#2118)

diff --git a/buildkite/bazel-central-registry/bcr_compatibility.py b/buildkite/bazel-central-registry/bcr_compatibility.py
index ec961e5..f427d37 100644
--- a/buildkite/bazel-central-registry/bcr_compatibility.py
+++ b/buildkite/bazel-central-registry/bcr_compatibility.py
@@ -32,7 +32,7 @@
     "bazel": {
         "default": 100,
         "windows": 30,
-        "macos_arm64": 45,
+        "macos_arm64": 95,
         "macos": 110,
         "arm64": 1,
     },