Update RELEASENOTES-DEVELOPMENT.md

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+Version 4.1-dev-283-ga62e4b0b
+====
+**Enhancements**
+* FreeBSD compatibility. Shairport Sync (and NQPTP) can now work in AirPlay 2 mode on a FreeBSD system. Note that the build instructions have changed and the old startup script must be manually removed before updating to the new version.
+* Certain Linux distributions -- notably Fedora 36 -- do not include a suitable AAC decoder for decoding AirPlay 2 Buffered Audio streams. Shairport Sync now includes a check to ensure that the AAC decoder can decode the stream, which seems to be encoded in Floating Point Linear Planar AAC ("`fltp`") format. (The AAC decoder is provided by the [`libavcodec`](https://www.ffmpeg.org/libavcodec.html) library, part of the [`ffmpeg`](https://www.ffmpeg.org) multimedia framework. If troubleshooting is necessary, the  [`ffmpeg`](https://www.ffmpeg.org/ffmpeg.html) command line tool is very useful.
+
 Version-4.1-dev-266-g1d228870
 ====
 **Minor Changes**