Update cpp-lint-action.yml to support clang v18

As per cpp-linter/cpp-linter-action#204

Author: shenxianpeng

.github/workflows/cpp-lint-action.yml

@@ -10,7 +10,7 @@ jobs:
  strategy:
  matrix:
  os: [ ubuntu-latest, macos-latest, windows-latest ]
- clang-version: ['9','10', '11', '12', '13', '14', '15', '16', '17']
+ clang-version: ['9','10', '11', '12', '13', '14', '15', '16', '17', '18']
  fail-fast: false
 
  runs-on: ${{ matrix.os }}