fix: add PHPCS ignore for base64_encode usage

Author: abouaksa-beapi

includes/Blocks/SharedBlock.php

@@ -290,12 +290,11 @@ private function get_rendered_block( int $site_id, int $post_id, string $block_i
 
 		// Prepare request arguments
 		$request_args = [];
-		
 		// Add authentication headers if in non-production environment and credentials are defined
 		if ( defined( 'MULTISITE_BLOCKS_AUTH_USER' ) && defined( 'MULTISITE_BLOCKS_AUTH_PWD' ) && ! empty( MULTISITE_BLOCKS_AUTH_USER ) && ! empty( MULTISITE_BLOCKS_AUTH_PWD ) ) {
 			$request_args = [
 				'headers' => [
-					'Authorization' => 'Basic ' . base64_encode( MULTISITE_BLOCKS_AUTH_USER . ':' . MULTISITE_BLOCKS_AUTH_PWD ),
+					'Authorization' => 'Basic ' . base64_encode( MULTISITE_BLOCKS_AUTH_USER . ':' . MULTISITE_BLOCKS_AUTH_PWD ), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
 				],
 			];
 		}