message: remove connrefused flag
diff: @@ -42,11 +42,11 @@ else ifneq (,$(wildcard bin/$(OS_TAG)-stanc))
  else ifeq ($(OS_TAG),windows)
  bin/stanc$(EXE) :
  @mkdir -p $(dir $@)
  - $(shell echo "curl -L https://github.com/stan-dev/stanc3/releases/download/nightly/$(OS_TAG)-stanc -o bin/stanc$(EXE) --retry $(STANC_DL_RETRY) --retry-connrefused --retry-delay $(STANC_DL_DELAY)")
  + $(shell echo "curl -L https://github.com/stan-dev/stanc3/releases/download/nightly/$(OS_TAG)-stanc -o bin/stanc$(EXE) --retry $(STANC_DL_RETRY) --retry-delay $(STANC_DL_DELAY)")
  else
  bin/stanc$(EXE) :
  @mkdir -p $(dir $@)
  - curl -L https://github.com/stan-dev/stanc3/releases/download/nightly/$(OS_TAG)-stanc -o bin/stanc$(EXE) --retry $(STANC_DL_RETRY) --retry-connrefused --retry-delay $(STANC_DL_DELAY)
  + curl -L https://github.com/stan-dev/stanc3/releases/download/nightly/$(OS_TAG)-stanc -o bin/stanc$(EXE) --retry $(STANC_DL_RETRY) --retry-delay $(STANC_DL_DELAY)
  chmod +x bin/stanc$(EXE)
  endif
  