docs(README): reserve height for image

Helps make links show up in right place

Author: cameronr

README.md

@@ -4,8 +4,8 @@
 
 Automatically reopen the files and windows you had open. It's like you never left!
 
-<img alt="demo" src="https://github.com/user-attachments/assets/8a779b99-d556-48a4-bd9f-dc88fb080a8e" width="800">
-  
+<img alt="demo" src="https://github.com/user-attachments/assets/8a779b99-d556-48a4-bd9f-dc88fb080a8e" width="800" height="538">
+
 [<img alt="GitHub Actions Workflow Status" src="https://img.shields.io/github/actions/workflow/status/rmagatti/auto-session/tests.yml?style=for-the-badge&label=tests">](https://github.com/rmagatti/auto-session/actions/workflows/tests.yml)
 
 <!-- panvimdoc-ignore-end -->