git: openjdk/amber-docs: Updated index for JDK 18 work in progress (#11)

[duke]

Changeset: 11c2d1e2
Author:    Gavin Bierman <GavinBierman at users.noreply.github.com>
Committer: GitHub <noreply at github.com>
Date:      2021-11-09 12:28:44 +0000
URL:       https://git.openjdk.java.net/amber-docs/commit/11c2d1e214f64478eada689ee8228633541df82a

Updated index for JDK 18 work in progress (#11)

* Updated index for JDK 18 work in progress

* Updating http to https

! site/_index.md