Fixed an issue where different cache key is generated for the same me…

…ssage content

class-gwiz-gf-openai.php

@@ -1358,7 +1358,7 @@ public function make_request( $endpoint, $body, $feed ) {
 
 		$cache_key = sha1( serialize( array(
 			'url'            => $url,
-			'body'           => $body,
+			'body'           => map_deep( $body, 'sanitize_text_field' ),
 			'request_params' => $this->get_request_params( $feed ),
 		) ) );