docs(release-notes): update release notes

Signed-off-by: Malte Schaaf <malte.schaaf@frequenz.com>

Author: malteschaaf

RELEASE_NOTES.md

@@ -10,7 +10,7 @@
 
 ## New Features
 
-<!-- Here goes the main new features and examples or instructions on how to use them -->
+* A new `tick_delay` option was added to `ResamplerConfig` and `ResamplerConfig2` to delay resampling execution after each timer tick. The delay was designed to postpone processing while keeping window boundaries aligned to the original tick times, which can be used for cascaded resampling pipelines. This option is experimental and may be changed or deprecated in a future release.
 
 ## Bug Fixes