improvement(release): clarify files are under 'Assets'

When I looked at the page, `Assets` was collapsed
and had the same section styles as the other h2s
so it was hard to distinguish what "Install `arm64-v8a`" meant

Author: david-allison

tools/release-description.md

@@ -4,7 +4,7 @@
 
 ## For regular users
 
-Install `arm64-v8a` below. If it fails to install, use `Parallel.A`.
+Install `arm64-v8a` from the **Assets** section below. If it fails to install, use `Parallel.A`.
 
 `Parallel` builds install side-by-side with the main APK, allowing you to use different settings and profiles (via the `AnkiDroid directory` advanced setting and a different AnkiWeb login).