gh-40899: Update CI matrix to exclude macOS version '13'
    
Removed macOS version '13' from CI matrix. Refer to
https://github.blog/changelog/2025-09-19-github-actions-macos-13-runner-
image-is-closing-down/ . Maybe we can add macos-26
@tobiasdiez
    
URL: #40899
Reported by: Chenxin Zhong
Reviewer(s): Copilot, Tobias Diez

Author: Release Manager

.github/workflows/ci-macos.yml

@@ -35,7 +35,6 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '13'
           - '14'
           - '15'