Fix Jeff Patton avatar image URL (#334)

## Summary
- Replace expired LinkedIn profile image URL with stable image from
jpattonassociates.com for the Product Thinking contributors list

## Test plan
- [ ] Verify Jeff Patton's avatar displays correctly on the Product
Thinking card

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Author: rjocham

site/data/contributions/product-thinking.yml

@@ -22,7 +22,7 @@
 
 - name: Jeff Patton
   url: https://www.linkedin.com/in/productdesigncoach/
-  image: https://media.licdn.com/dms/image/v2/D5603AQG93nxt9BBCSQ/profile-displayphoto-shrink_800_800/profile-displayphoto-shrink_800_800/0/1692880069997?e=1770854400&v=beta&t=OLfS8QIqd92mF4C28G1mjITJddonDsMvhKDIgIeeHPY
+  image: https://jpattonassociates.com/wp-content/uploads/2026/02/image-4-1024x990.png
   contributions:
     - "2026.1"
   role: contributor