test(uri): correct typo preventing non-unified test runs

Author: mbroadst

test/functional/uri_tests.js

@@ -199,7 +199,7 @@ describe('URI', function() {
 
       const topologyPrototype = this.configuration.usingUnifiedTopology()
         ? NativeTopology.prototype
-        : ReplSet.prototpe;
+        : ReplSet.prototype;
 
       const connectStub = sinon.stub(topologyPrototype, 'connect').callsFake(validateConnect);
       const uri = 'mongodb://some-hostname/test?ssl=true&authMechanism=MONGODB-X509&replicaSet=rs0';