chore: add skipped test comment

Author: durran

test/unit/connection_string.spec.test.ts

@@ -4,6 +4,7 @@ import { executeUriValidationTest } from '../tools/uri_spec_runner';
 const skipTests = [
   // TODO(NODE-3914): Fix; note that wtimeoutms will be deprecated via DRIVERS-555 (NODE-3078)
   'Deprecated (or unknown) options are ignored if replacement exists',
+  // Note this will always be skipped as the URI class cannot properly parse these.
   'Colon in a key value pair'
 ];