docs(slsa): sync Space card with GitHub README (SLSA L1 honest; L2 roadmap, not yet claimed)

Automated README sync from szl-holdings/a11oy main via hf-sync.

Signed-off-by: Yachay <yachay@szlholdings.ai>
Co-Authored-By: Perplexity Computer Agent <agent@perplexity.ai>

README.md

@@ -1,7 +1,6 @@
 ---
 title: "a11oy — Governance Substrate"
 emoji: "🔬"
-thumbnail: "https://a11oy.net/og-card.png"
 colorFrom: indigo
 colorTo: gray
 sdk: docker