fix(ekka): update ekka version to fix oom (#3871)

rebar.config

@@ -14,6 +14,7 @@
 {overrides,[{add,[{erl_opts,[no_debug_info,compressed,deterministic,
                              {parse_transform,mod_vsn}]}]}]}.
 
+
 {xref_checks,[undefined_function_calls,undefined_functions,locals_not_used,
               deprecated_function_calls,warnings_as_errors, deprecated_functions]}.
 
@@ -37,7 +38,7 @@
     , {jiffy, {git, "https://github.com/emqx/jiffy", {tag, "1.0.5"}}}
     , {cowboy, {git, "https://github.com/emqx/cowboy", {tag, "2.7.1"}}}
     , {esockd, {git, "https://github.com/emqx/esockd", {tag, "5.7.4"}}}
-    , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.7.4"}}}
+    , {ekka, {git, "https://github.com/emqx/ekka", {tag, "0.7.5"}}}
     , {gen_rpc, {git, "https://github.com/emqx/gen_rpc", {tag, "2.5.0"}}}
     , {cuttlefish, {git, "https://github.com/emqx/cuttlefish", {tag, "v3.0.0"}}}
     , {minirest, {git, "https://github.com/emqx/minirest", {tag, "0.3.2"}}}