Update cards on homepage (#1905)

* Update cards on homepage

Replacing SC Candidates with USRSE'26

* Typo

* Fixed conference URL

Author: JeffCarver

_data/callouts/home.yml

@@ -6,10 +6,10 @@ items:
       Learn about recent and planned activities of the US-RSE Association, current job postings, community news, and more.<br>
     link: newsletters/
     link_name: Newsletters
-  - title: 2025 Steering Committee Candidates Announced
+  - title: USRSE'26 - Oct. 19-21
     subtitle: >
-      The yearly Steering Committee elections are coming up soon. Read about our candidates and why they want to represent you.<br>
-    link: 2025-11-11-sc-candidates/
+      USRSE'26: Advancing Science in the Age of AI will be held in San Jose, CA.<br>
+    link: https://us-rse.org/usrse26/
     link_name: Learn More
   - title: 2025 Community Awards Winners Announced
     subtitle: >