fix(ft): synchronize erlcloud deps

apps/emqx_bridge_dynamo/rebar.config

@@ -1,6 +1,6 @@
 %% -*- mode: erlang; -*-
 {erl_opts, [debug_info]}.
-{deps, [ {erlcloud, {git, "https://github.com/emqx/erlcloud.git", {tag, "3.5.16-emqx-1"}}}
+{deps, [ {erlcloud, {git, "https://github.com/emqx/erlcloud", {tag, "3.6.8-emqx-1"}}}
        , {emqx_connector, {path, "../../apps/emqx_connector"}}
        , {emqx_resource, {path, "../../apps/emqx_resource"}}
        , {emqx_bridge, {path, "../../apps/emqx_bridge"}}