message: fix for downloading windows-stanc
diff: @@ -14,5 +14,9 @@ endif
  bin/stanc$(EXE) :
  @mkdir -p $(dir $@)
  +ifeq ($(OS_TAG),windows)
  + $(shell echo "curl -L https://github.com/stan-dev/stanc3/releases/download/nightly/$(OS_TAG)-stanc -o bin/stanc$(EXE)")
  +else
  curl -L https://github.com/stan-dev/stanc3/releases/download/nightly/$(OS_TAG)-stanc -o bin/stanc
  chmod +x bin/stanc
  +endif
  \ No newline at end of file
  