Merge pull request #4252 from zmstone/chore-dashboard-pin-dashboard-frontend-tag

chore(dashboard): Pin dashboard frontend tag v4.3.0-beta.1

Makefile

@@ -1,5 +1,5 @@
 REBAR_VERSION = 3.14.3-emqx-4
-DASHBOARD_VERSION = v4.3.0
+DASHBOARD_VERSION = v4.3.0-beta.1
 REBAR = $(CURDIR)/rebar3
 BUILD = $(CURDIR)/build
 SCRIPTS = $(CURDIR)/scripts