update shell lesson link to canonical lesson

Author: josenino95

content/workshop/2025-10-07-ucsb-shell.md

@@ -10,7 +10,7 @@ instructors: James Frew, Seth Erickson
 helpers: Jean Allen, Youjia He, Jay Chi
 pre_workshop_survey: "https://ucsb.co1.qualtrics.com/jfe/form/SV_bJeIoxjp1A9Xx3M?slug=2025-10-07-ucsb-shell"
 post_workshop_survey: "https://ucsb.co1.qualtrics.com/jfe/form/SV_0lD2XHnezknmSr4?slug=2025-10-07-ucsb-shell"
-lesson_url: "https://carpentry.library.ucsb.edu/shell-novice/index.html"
+lesson_url: "https://swcarpentry.github.io/shell-novice/"
 shoreline_url: "https://cglink.me/2dD/r2268251"
 description: "The Unix Shell is a powerful command-line interface that allows you to control your computer more efficiently than a traditional graphical interface. This hands-on workshop will introduce fundamental skills, including navigating files and directories, manipulating data, and writing simple scripts.
 <br><br>