Update dependency cibuildwheel to v4 (#9665)

Co-authored-by: Andrew Murray <radarhere@users.noreply.github.com>

Author: renovate[bot]

.ci/requirements-cibw.txt

@@ -1 +1 @@
-cibuildwheel==3.4.1
+cibuildwheel==4.0.0

.github/workflows/wheels.yml

@@ -36,7 +36,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  EXPECTED_DISTS: 66
+  EXPECTED_DISTS: 87
   FORCE_COLOR: 1
 
 jobs:
@@ -64,7 +64,7 @@ jobs:
             platform: macos
             os: macos-26-intel
             cibw_arch: x86_64
-            build: "{cp314,pp3}*"
+            build: "{cp314,cp315,pp3}*"
             macosx_deployment_target: "10.15"
           - name: "macOS arm64"
             platform: macos