build: use doc-only instead of doc

Use `make doc-only` instead of `make doc` where applicable.

PR-URL: nodejs/node#16309
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Makefile

@@ -211,7 +211,7 @@ else
 test: all
 	$(MAKE) build-addons
 	$(MAKE) build-addons-napi
-	$(MAKE) doc
+	$(MAKE) doc-only
 	$(MAKE) cctest
 	$(PYTHON) tools/test.py --mode=release -J \
 		$(CI_ASYNC_HOOKS) \
@@ -391,7 +391,7 @@ test-ci-js: | clear-stalled
 	fi
 
 test-ci: LOGLEVEL := silent
-test-ci: | clear-stalled build-addons build-addons-napi doc
+test-ci: | clear-stalled build-addons build-addons-napi doc-only
 	out/Release/cctest --gtest_output=tap:cctest.tap
 	$(PYTHON) tools/test.py $(PARALLEL_ARGS) -p oneline \
 		--mode=release --flaky-tests=$(FLAKY_TESTS) \