Update dependency macos to v15

Author: renovate[bot]

.github/workflows/cpp-coverage.yml

@@ -13,7 +13,7 @@ on: # yamllint disable-line rule:truthy
 jobs:
  coverage:
  name: C++ CMake CI Coverage
- runs-on: macos-14
+ runs-on: macos-15
 
  steps:
  - name: Checkout repository