README: Fix outdated "Compatibility" section

Turbo87 · Turbo87 · commit 596241fcf81e · 2021-07-05T12:07:18.000+02:00
diff --git a/README.md b/README.md
@@ -29,7 +29,7 @@ Compatibility
 
 - Ember 3.8 or above
 - Ember CLI 3.8 or above
-- Node.js 10 or above
+- Node.js 12 or above
 
 
 Installation
