build: make lint-addon-docs quiet

This commit adds the --quiet flag to cpplint for the lint-addon-docs
target to be consistent with the lint-cpp target.

PR-URL: #23217
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

Makefile

@@ -1193,7 +1193,7 @@ tools/.cpplintstamp: $(LINT_CPP_FILES)
 
 lint-addon-docs: test/addons/.docbuildstamp
 	@echo "Running C++ linter on addon docs..."
-	@$(PYTHON) tools/cpplint.py --filter=$(ADDON_DOC_LINT_FLAGS) $(LINT_CPP_ADDON_DOC_FILES_GLOB)
+	@$(PYTHON) tools/cpplint.py --quiet --filter=$(ADDON_DOC_LINT_FLAGS) $(LINT_CPP_ADDON_DOC_FILES_GLOB)
 
 cpplint: lint-cpp
 	@echo "Please use lint-cpp instead of cpplint"