fix: bump emqx version to 5.1.2 (#199)

Author: urvashijain18

Diff for: .github/workflows/build.yml

@@ -86,7 +86,7 @@ jobs:
           path: |
             emqx
           # TODO use commit as cache key
-          key: cache-emqx-5.1.1-${{ matrix.os }}
+          key: cache-emqx-5.1.2-${{ matrix.os }}
       - name: Build EMQX
         if: steps.cache-emqx-restore.outputs.cache-hit != 'true'
         run: |

Diff for: THIRD-PARTY-LICENSES

@@ -1,5 +1,5 @@
 ** aws-iot-device-sdk-cpp-v2; version 1.18.2 -- https://github.com/aws/aws-iot-device-sdk-cpp-v2/
-** EMQX; version 5.1.1 -- https://emqx.io/
+** EMQX; version 5.1.2 -- https://emqx.io/
 ** Erlang OTP; version 24.0 -- https://www.erlang.org/
 
 Apache License

Diff for: emqx.commit

@@ -1 +1 @@
-659980f69d1d4529ab79970ad9b345c898597269
+7df0c6a808ee9a546fd0bfddbdc1a5b5512fdd1b

Diff for: gg/src/gg_conf.erl

@@ -245,7 +245,7 @@ get_override_conf(Conf) ->
 
 %% We don't set cacertfile in ssl options. In order for this to take
 %% in emqx_conf_cli:load_config, we must remove it from the configuration map.
-%% Setting cacertfile to null, undefined, or empty string does not work (as of EMQX 5.1.1)
+%% Setting cacertfile to null, undefined, or empty string does not work (as of EMQX 5.1.2)
 no_cacertfile_workaround(#{<<"listeners">> := Val} = Conf) ->
   Conf#{<<"listeners">> => no_cacertfile_workaround(Val)};
 no_cacertfile_workaround(#{<<"ssl">> := Val} = Conf) ->