Adjust println-type test to include prelude items

While this is undesired, blocking explicit macro export and
assert_matches for this bug that already exists in a smaller fashion was
deemed not worth it.

See #145577 and
#139493 (comment)

Author: Voultapher

tests/rustdoc-js-std/println-typo.js

@@ -6,7 +6,10 @@ const EXPECTED = {
     'query': 'prinltn',
     'others': [
         { 'path': 'std', 'name': 'println' },
+        { 'path': 'std::prelude::v1', 'name': 'println' },
         { 'path': 'std', 'name': 'print' },
+        { 'path': 'std::prelude::v1', 'name': 'print' },
         { 'path': 'std', 'name': 'eprintln' },
+        { 'path': 'std::prelude::v1', 'name': 'eprintln' },
     ],
 };