Coding Standards: Use camel case with a lowercase first letter for the `blockTheme` array key.

This matches the WordPress JS naming conventions and the naming of other keys in the `$prepared_themes` array.

Follow-up to [52341].

See #54578, #53359.
Built from https://develop.svn.wordpress.org/trunk@52346


git-svn-id: http://core.svn.wordpress.org/trunk@51938 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/theme.php

@@ -782,7 +782,7 @@ function wp_prepare_themes_for_js( $themes = null ) {
 					? wp_nonce_url( admin_url( 'themes.php?action=' . $auto_update_action . '&stylesheet=' . $encoded_slug ), 'updates' )
 					: null,
 			),
-			'block_theme'    => $theme->is_block_theme(),
+			'blockTheme'     => $theme->is_block_theme(),
 		);
 	}
 

wp-admin/themes.php

@@ -900,7 +900,7 @@ function wp_theme_auto_update_setting_template() {
 					$aria_label = sprintf( _x( 'Activate %s', 'theme' ), '{{ data.name }}' );
 					?>
 					<a class="button activate" href="{{{ data.actions.activate }}}" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _e( 'Activate' ); ?></a>
-					<# if ( ! data.block_theme ) { #>
+					<# if ( ! data.blockTheme ) { #>
 						<?php
 						/* translators: %s: Theme name. */
 						$live_preview_aria_label = sprintf( _x( 'Live Preview %s', 'theme' ), '{{ data.name }}' );

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-beta2-52345';
+$wp_version = '5.9-beta2-52346';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.