Fix laravel#14506 (laravel#14510)

Shorten too broad PhpDoc @return tag from `@return \Illuminate\Database\Query\Builder|static` to `@return \Illuminate\Database\Query\Builder`.

src/Illuminate/Database/Eloquent/Builder.php

@@ -1292,7 +1292,7 @@ protected function nestWhereSlice($whereSlice, $boolean = 'and')
     /**
      * Get the underlying query builder instance.
      *
-     * @return \Illuminate\Database\Query\Builder|static
+     * @return \Illuminate\Database\Query\Builder
      */
     public function getQuery()
     {