Fixup transaction type tests

These tests are using a filter on the `name` field, which isn't defined
in the schema. This is now considered a type error. I've added the
`name` field to the schema as a string, which fixes the errors.

Author: noahsilas

test/types/community/transaction.test-d.ts

@@ -8,6 +8,7 @@ const client = new MongoClient('');
 const session = client.startSession();
 
 interface Account {
+  name: string;
   balance: number;
 }