fixup

.github/workflows/linux.yml

@@ -14,6 +14,7 @@ jobs:
       shell: bash
       run: |
         wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
+        sudo mkdir -p /etc/apt/sources.list.d
         sudo echo "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy main" >> /etc/apt/sources.list.d/llvm.list
         sudo echo "deb-src http://apt.llvm.org/jammy/ llvm-toolchain-jammy main" >> /etc/apt/sources.list.d/llvm.list
         sudo apt update -y