Revert "Update LLVM (#27)"

This reverts commit f2b20fb.

Author: matcool

action.yml

@@ -164,7 +164,7 @@ runs:
       if: steps.platform.outputs.id == 'win'
       shell: bash
       run: |
-        curl -L https://github.com/llvm/llvm-project/releases/download/llvmorg-19.1.7/LLVM-19.1.7-win64.exe -o llvm-inst.exe
+        curl -L https://github.com/llvm/llvm-project/releases/download/llvmorg-17.0.6/LLVM-17.0.6-win64.exe -o llvm-inst.exe
         7z x llvm-inst.exe -ollvm bin/clang.exe bin/clang++.exe bin/lld-link.exe bin/llvm-rc.exe bin/*.dll lib/clang/*/include/*
         echo "$GITHUB_WORKSPACE/llvm/bin" >> $GITHUB_PATH