Update Hacktoberfest 2025 event URL to point to the live stream

Signed-off-by: Lee Calcote <lee.calcote@layer5.io>

Author: leecalcote

src/collections/events/2025/hacktoberfest-2025/index.mdx

@@ -4,7 +4,7 @@ description: "Prepare for Hacktoberfest with Layer5 MeshMates and Maintainers. J
 thumbnail: ./hacktoberfest-layer5-first-pr.webp
 darkthumbnail: ./hacktoberfest-layer5-first-pr.webp
 date: 2025-10-03
-#eurl: https://hacktoberfest.com
+eurl: https://youtube.com/live/1-oaEy0Pm5I?feature=share
 type: Event
 speakers: [Ritesh Karankal, Aabid Sofi, Yash Sharma]
 published: true