Minor typing improvements

tests/NodaWikidataFetcherTest.php

@@ -41,7 +41,7 @@ final class NodaWikidataFetcherTest extends TestCase {
     /**
      * Data provider providing a Wikidata ID for a dedicated wikidata item for disambiguation pages.
      *
-     * @return array<string: array{0: string}>
+     * @return array<string, array{0: string}>
      */
     public static function disambiguationPageProvider():array {