fix(mongo): update mongodb to 3.0.10

apps/emqx_auth_mongo/rebar.config

@@ -1,6 +1,6 @@
 {deps,
   %% NOTE: mind poolboy version when updating mongodb-erlang version
- [{mongodb, {git,"https://github.com/emqx/mongodb-erlang", {tag, "v3.0.7"}}},
+ [{mongodb, {git,"https://github.com/emqx/mongodb-erlang", {tag, "v3.0.10"}}},
   %% mongodb-erlang uses a special fork https://github.com/comtihon/poolboy.git
   %% (which has overflow_ttl feature added).
   %% However, it references `{branch, "master}` (commit 9c06a9a on 2021-04-07).