docs/release-notes: update for 2.20.0

Author: prestist

docs/release-notes.md

@@ -4,12 +4,21 @@ nav_order: 9
 
 # Release Notes
 
-## Upcoming Ignition 2.20.0 (unreleased)
+## Upcoming Ignition 2.21.0 (unreleased)
 
 ### Breaking changes
 
 ### Features
 
+### Changes
+
+### Bug fixes
+
+
+## Ignition 2.20.0 (2024-10-22)
+
+### Features
+
 - Support partitioning disk with mounted partitions
 - Support Proxmox VE
 - Support gzipped Akamai user_data
@@ -27,6 +36,7 @@ nav_order: 9
 - Fix Akamai Ignition base64 decoding on padded payloads
 - Fix Makefile GOARCH for loongarch64 ([#1942](https://github.com/coreos/ignition/pull/1942))
 
+
 ## Ignition 2.19.0 (2024-06-05)
 
 Starting with this release, ignition-validate binaries are signed with the