reset default

.devcontainer/Dockerfile

@@ -44,7 +44,7 @@ RUN add-apt-repository -y ppa:ubuntu-toolchain-r/test && \
 RUN update-alternatives --install /usr/bin/gcc gcc $(which gcc-${GCC_VER}) 100
 RUN update-alternatives --install /usr/bin/g++ g++ $(which g++-${GCC_VER}) 100
 
-ARG LLVM_VER="17"
+ARG LLVM_VER="15"
 # Add clang-${LLVM_VER}
 ARG LLVM_URL="http://apt.llvm.org/${VARIANT}/"
 ARG LLVM_PKG="llvm-toolchain-${VARIANT}-${LLVM_VER}"