Fix Space metadata: suggested_hardware not hardware

hardware: zero-gpu is not a documented frontmatter field and has no
effect. The correct field is suggested_hardware: zero-a10g, which
hints to people duplicating the Space what hardware to request.

Actual ZeroGPU hardware is assigned via Space Settings UI (requires
PRO subscription) — frontmatter cannot assign hardware.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -10,7 +10,7 @@ pinned: true
 short_description: DeepSeek-OCR-2 with MathJax math rendering
 license: mit
 python_version: "3.12"
-hardware: zero-gpu
+suggested_hardware: zero-a10g
 ---
 
 # DeepSeek-OCR-2 — Math Rendering Edition