Add gif for Linear integration section

Updated README to include an image for Linear integration.

Author: centdix

README.md

@@ -36,7 +36,7 @@ Run agents in isolated Docker containers for untrusted or experimental work. web
 
 ### Linear Integration
 
-<!-- gif -->
+![linear-1 5x](https://github.com/user-attachments/assets/3187fbe2-eeee-4a33-8780-c51c3575b72a)
 
 See your assigned Linear issues alongside your worktrees. webmux matches branches to issues automatically, so you can browse your backlog, pick an issue, and spin up a worktree for it in one click.