fix: rename to match component

Author: atyrode

src/frontend/src/styles/CustomRendererEmbeddable.scss renamed to src/frontend/src/styles/CustomEmbeddableRenderer.scss

@@ -4,7 +4,7 @@
 @import './FeedbackButton.scss';
 @import './DiscordButton.scss';
 @import './MainMenuLabel.scss';
-@import './CustomRendererEmbeddable.scss';
+@import './CustomEmbeddableRenderer.scss';
 
 /* Override Excalidraw styles */