doc: update release notes

Author: mfacchinelli

resources/release-notes.md

@@ -4,4 +4,7 @@
 
 ## Software
 
+- (All) Add support for showing multiple lines in a stacked plot
+- (All) Allow specifying `LegendOrientation` for axes that support legends
 - (HelioSwarm) Add support for `hs-mag` v2.0.0 artifacts
+- (IMAP) Fix issue in field view where events for a sensor with no data are still being shown