chore: add a comment to explain why bpapi is only checked for enterprise

Makefile

@@ -77,6 +77,7 @@ test-compile: $(REBAR) merge-config
 ct: $(REBAR) merge-config
 	@ENABLE_COVER_COMPILE=1 $(REBAR) ct --name $(CT_NODE_NAME) -c -v --cover_export_name $(CT_COVER_EXPORT_PREFIX)-ct
 
+## only check bpapi for enterprise profile because it's a super-set.
 .PHONY: static_checks
 static_checks:
 	@$(REBAR) as check do dialyzer, xref