chore: upgrade gun and ehttpc

- gun from 1.3.9 to 1.3.10 for otp 26 type spec fix
- ehttpc from 0.4.11 to 0.4.12 for error handling improvements

mix.exs

@@ -49,7 +49,7 @@ defmodule EMQXUmbrella.MixProject do
       {:redbug, github: "emqx/redbug", tag: "2.0.10"},
       {:covertool, github: "zmstone/covertool", tag: "2.0.4.1", override: true},
       {:typerefl, github: "ieQu1/typerefl", tag: "0.9.1", override: true},
-      {:ehttpc, github: "emqx/ehttpc", tag: "0.4.11", override: true},
+      {:ehttpc, github: "emqx/ehttpc", tag: "0.4.12", override: true},
       {:gproc, github: "emqx/gproc", tag: "0.9.0.1", override: true},
       {:jiffy, github: "emqx/jiffy", tag: "1.0.6", override: true},
       {:cowboy, github: "emqx/cowboy", tag: "2.9.2", override: true},
@@ -77,7 +77,7 @@ defmodule EMQXUmbrella.MixProject do
       {:esasl, github: "emqx/esasl", tag: "0.2.0"},
       {:jose, github: "potatosalad/erlang-jose", tag: "1.11.2"},
       # in conflict by ehttpc and emqtt
-      {:gun, github: "emqx/gun", tag: "1.3.9", override: true},
+      {:gun, github: "emqx/gun", tag: "1.3.10", override: true},
       # in conflict by emqx_connector and system_monitor
       {:epgsql, github: "emqx/epgsql", tag: "4.7.1.1", override: true},
       # in conflict by emqx and observer_cli

rebar.config

@@ -64,8 +64,8 @@
     , {covertool, {git, "https://github.com/zmstone/covertool", {tag, "2.0.4.1"}}}
     , {gpb, "4.19.9"}
     , {typerefl, {git, "https://github.com/ieQu1/typerefl", {tag, "0.9.1"}}}
-    , {gun, {git, "https://github.com/emqx/gun", {tag, "1.3.9"}}}
-    , {ehttpc, {git, "https://github.com/emqx/ehttpc", {tag, "0.4.11"}}}
+    , {gun, {git, "https://github.com/emqx/gun", {tag, "1.3.10"}}}
+    , {ehttpc, {git, "https://github.com/emqx/ehttpc", {tag, "0.4.12"}}}
     , {gproc, {git, "https://github.com/emqx/gproc", {tag, "0.9.0.1"}}}
     , {jiffy, {git, "https://github.com/emqx/jiffy", {tag, "1.0.6"}}}
     , {cowboy, {git, "https://github.com/emqx/cowboy", {tag, "2.9.2"}}}