Add symlink

Author: soutaro

.github/workflows/c-check.yml

@@ -26,6 +26,7 @@ jobs:
           sudo apt-add-repository "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-20 main"
           sudo apt-get update
           sudo apt-get install -y clang-format-20
+          sudo ln -sf /usr/bin/clang-format-20 /usr/local/bin/clang-format
           clang-format --version
       - name: Install Re2c
         run: |