Add release notes for v0.0.9

docs/release-notes/v0.0.md

@@ -4,6 +4,28 @@ tocdepth: 2
 
 # v0.0
 
+## v0.0.9
+
+*Released November 12, 2023*
+
+### Changes
+
+- Added polyphase rational resampling in `sdr.Resampler`.
+- Added discrete-time FIR differentiating filters in `sdr.Differentiator`.
+- Added discrete-time IIR integrating filters in `sdr.Integrator`.
+- Added `sdr.percent()`, `sdr.ppm()`, and `sdr.ppb()`.
+- Moved `sdr.DDS` functionality into `sdr.NCO`. Removed `sdr.DDS`.
+- Added ability to seed the channel models.
+- Added option to compute measurements along a specified axis.
+- Added option to return measurements in decibels.
+- Replaced `pylint` with `ruff`.
+- Replaced `black` with `ruff`.
+- Improved type annotations.
+
+### Contributors
+
+- Matt Hostetter ([@mhostetter](https://github.com/mhostetter))
+
 ## v0.0.8
 
 *Released September 4, 2023*