ci: update build.yml to clang 20

- only available for linux atm

Author: Totto16

.github/workflows/build.yml

@@ -145,21 +145,21 @@ jobs:
         run: |
           wget https://apt.llvm.org/llvm.sh
           chmod +x llvm.sh
-          sudo ./llvm.sh 19
-          sudo apt-get install libc++-19* libc++abi*19* -y --no-install-recommends
-          echo "CC=clang-19" >> "$GITHUB_ENV"
-          echo "CXX=clang++-19" >> "$GITHUB_ENV"
-          echo "OBJC=clang-19" >> "$GITHUB_ENV"
+          sudo ./llvm.sh 20
+          sudo apt-get install libc++-20* libc++abi*20* -y --no-install-recommends
+          echo "CC=clang-20" >> "$GITHUB_ENV"
+          echo "CXX=clang++-20" >> "$GITHUB_ENV"
+          echo "OBJC=clang-20" >> "$GITHUB_ENV"
 
       - name: Setup Clang (Linux) (libstdc++)
         if: matrix.config.os == 'ubuntu' && matrix.config.use-clang == true && (! matrix.config.use-clang_stdlib)
         run: |
           wget https://apt.llvm.org/llvm.sh
           chmod +x llvm.sh
-          sudo ./llvm.sh 19
-          echo "CC=clang-19" >> "$GITHUB_ENV"
-          echo "CXX=clang++-19" >> "$GITHUB_ENV"
-          echo "OBJC=clang-19" >> "$GITHUB_ENV"
+          sudo ./llvm.sh 20
+          echo "CC=clang-20" >> "$GITHUB_ENV"
+          echo "CXX=clang++-20" >> "$GITHUB_ENV"
+          echo "OBJC=clang-20" >> "$GITHUB_ENV"
 
       - name: Setup GCC (Linux)
         if: matrix.config.os == 'ubuntu' && matrix.config.use-clang == false