test: update python-test.yml to fix CI failure

Author: shenxianpeng

.github/workflows/python-test.yml

@@ -121,7 +121,7 @@ jobs:
         shell: bash
         run: |
           case "${{ matrix.version }}" in
-            15|16|18)
+            15|16|18|20)
               clang-format.exe --version
               clang-tidy.exe --version
               clang-query.exe --version