Fix typo in ydb_query_v1.proto (#9364)

Author: amikish

ydb/public/api/grpc/ydb_query_v1.proto

@@ -7,7 +7,7 @@ import "ydb/public/api/protos/ydb_operation.proto";
 import "ydb/public/api/protos/ydb_query.proto";
 
 service QueryService {
-    // Sessions are basic primitives for communicating with YDB Query Service. The are similar to
+    // Sessions are basic primitives for communicating with YDB Query Service. They are similar to
     // connections for classic relational DBs. Sessions serve three main purposes:
     // 1. Provide a flow control for DB requests with limited number of active channels.
     // 2. Distribute load evenly across multiple DB nodes.