[Bug]: RawLog of gov vote transaction is not a valid json

[dimiandre]

Summary of Bug

If you query for a governance vote transaction, nasted RawLog of the vote option is not a valid json

Example:

https://rest.cosmos.directory/mars/cosmos/tx/v1beta1/txs/EF39B8E606847E89D59B57CFE567AE12A0292690A88C398FD7CB3AF8B3823046

[
   {
      "msg_index":0,
      "events":[
         {
            "type":"message",
            "attributes":[
               {
                  "key":"action",
                  "value":"/cosmos.authz.v1beta1.MsgExec"
               },
               {
                  "key":"module",
                  "value":"governance"
               },
               {
                  "key":"sender",
                  "value":"mars1dx9t70pvn4g9rsyyenxahkh4uw7ph62jdk36e7"
               },
               {
                  "key":"authz_msg_index",
                  "value":"0"
               }
            ]
         },
         {
            "type":"proposal_vote",
            "attributes":[
               {
                  "key":"option",
                  "value":"option:VOTE_OPTION_YES weight:\"1.000000000000000000\""
               },
               {
                  "key":"proposal_id",
                  "value":"89"
               },
               {
                  "key":"authz_msg_index",
                  "value":"0"
               }
            ]
         }
      ]
   }
]

you can see in the key "option", "value" is not a valid json.

 {
    "key":"option",
    "value":"option:VOTE_OPTION_YES weight:\"1.000000000000000000\""
 },

In previous SDK version it was formatted correctly

 {
    "key":"option",
    "value":"{\"option\":1,\"weight\":\"1.000000000000000000\"}"
 }

Version

Mars Mainnet SDK v0.46.9