Tests: Use assertSame() in Tests_Theme_wpThemeJson.

Change from assertEquals() to assertSame(). Why? To ensure both the return value and data type match the expected results.

Follow-up to [55216].

Props costdev, peterwilsoncc, mukesh27, ankitmaru.
See #56800, #57621.
Built from https://develop.svn.wordpress.org/trunk@55468


git-svn-id: http://core.svn.wordpress.org/trunk@55001 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-beta4-55467';
+$wp_version = '6.2-beta4-55468';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.