fix: typo in xmltv.ts comment

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: JCBird1012

src/xmltv.ts

@@ -31,7 +31,7 @@ export function buildChannelsXml(
   data: GridApiResponse,
   options: XmltvOptions = {},
 ): string {
-  // Handle the caller ommitting XmltvOptions
+  // Handle the caller omitting XmltvOptions
   const thumbnailWidth = options.channelThumbnailWidth ?? null;
   let xml = "";