correct terminology

Author: ethanpalm

components/code-groups.mdx

@@ -26,7 +26,7 @@ class HelloWorld {
 
 </CodeGroup>
 
-To create a code group, wrap multiple code blocks with `<CodeGroup>` tags. Each code block must include filename, which becomes the tab label.
+To create a code group, wrap multiple code blocks with `<CodeGroup>` tags. Each code block must include a title, which becomes the tab label.
 
 ````mdx
 <CodeGroup>