chore: update emqx depency version

Author: urvashijain18

gg/rebar.config

@@ -5,6 +5,7 @@
   {emqx, {git_subdir, "https://github.com/emqx/emqx.git", {tag, "v5.1.1"}, "apps/emqx"}},
   {emqx_ctl, {git_subdir, "https://github.com/emqx/emqx.git", {tag, "v5.1.1"}, "apps/emqx_ctl"}},
   {emqx_utils, {git_subdir, "https://github.com/emqx/emqx.git", {tag, "v5.1.1"}, "apps/emqx_utils"}}
+  {emqx_durable_storage, {git_subdir, "https://github.com/emqx/emqx.git", {tag, "v5.1.2"}, "apps/emqx_durable_storage"}}
 ]}.
 
 {relx, [