chore(dashboard): bump dashboard version to v1.9.1 & e1.7.1

Makefile

@@ -20,8 +20,8 @@ endif
 
 # Dashboard version
 # from https://github.com/emqx/emqx-dashboard5
-export EMQX_DASHBOARD_VERSION ?= v1.9.1-beta.1
-export EMQX_EE_DASHBOARD_VERSION ?= e1.7.1-beta.1
+export EMQX_DASHBOARD_VERSION ?= v1.9.1
+export EMQX_EE_DASHBOARD_VERSION ?= e1.7.1
 
 -include default-profile.mk
 PROFILE ?= emqx