Add release notes

llucax · llucax · commit 5ab859dbc1ab · 2023-07-11T13:58:57.000+02:00
Signed-off-by: Leandro Lucarella &lt;luca-frequenz@llucax.com&gt;
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
@@ -16,6 +16,7 @@
 * Bump SDK version to v0.22.0.
 * Capitalize project name in title and expand shortened words.
 * Add a few more default keywords.
+* Add variable reference documentation.
 
 ## Bug Fixes
 
