Add logo for JuMP-dev 2026 (#192)

Author: odow

_config.yml

@@ -173,4 +173,4 @@ sharing_links: # Appear at the bottom of single blog posts, add as desired. The
 
 # Site header notification content
 notification: |
- [JuMP-dev 2026 will be held May 30-June 1 in Edinburgh, Scotland](/meetings/jumpdev2026/)
+ [JuMP-dev 2026 will be held May 31-June 1 in Edinburgh, Scotland](/meetings/jumpdev2026/)

_posts/2025-10-23-jump_dev_2026.md

@@ -6,6 +6,8 @@ categories: [jump-dev]
 permalink: /meetings/jumpdev2026/
 ---
 
+<img src="/assets/jump-dev-workshops/2026/logo.png" alt="JuMP-dev 2026 logo" width="25%">
+
 JuMP-dev 2026 will be held Sunday, May 31 and Monday June 1, 2026 in Edinburgh,
 Scotland.
 
@@ -85,3 +87,5 @@ details, see [Summer stays at the University of Edinburgh](https://www.booking.c
  * Chelsea Sidrane (KTH)
  * Julian Hall (University of Edinburgh; local organization)
  * Ivet Galabova (University of Edinburgh; local organization)
+
+To contact the program committee, write to `jump-dev-2026@googlegroups.com`.