docs(x/feegrant): fix allowance typo (#20000)

Co-authored-by: Marko <marko@baricevic.me>

Author: cor

api/cosmos/feegrant/v1beta1/query_grpc.pb.go

@@ -29488,7 +29488,7 @@ paths:
         - Query
   /cosmos/feegrant/v1beta1/allowance/{granter}/{grantee}:
     get:
-      summary: Allowance returns granted allwance to the grantee by the granter.
+      summary: Allowance returns granted allowance to the grantee by the granter.
       operationId: Allowance
       responses:
         '200':

client/docs/swagger-ui/swagger.yaml

@@ -12,7 +12,7 @@ option go_package = "cosmossdk.io/x/feegrant";
 // Query defines the gRPC querier service.
 service Query {
 
-  // Allowance returns granted allwance to the grantee by the granter.
+  // Allowance returns granted allowance to the grantee by the granter.
   rpc Allowance(QueryAllowanceRequest) returns (QueryAllowanceResponse) {
     option (google.api.http).get = "/cosmos/feegrant/v1beta1/allowance/{granter}/{grantee}";
   }