use empty string instead of v20

Author: 2bndy5

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

@@ -52,7 +52,7 @@ jobs:
           ignore: build
           database: build
           verbosity: debug
-          version: ${{ matrix.clang-version }}
+          version: ${{ matrix.clang-version != '20' && matrix.clang-version || ''}}
           thread-comments: ${{ matrix.clang-version == '17' && 'update' }}
           file-annotations: ${{ matrix.clang-version == '17' }}
           extra-args: -std=c++14 -Wall