Finalize release 5.9.0
<url>http://www.keil.com/pack/</url>
<releases>
- <release version="5.9.0">
- Active development ...
+ <release version="5.9.0" date="2022-05-02">
CMSIS-Core(M): 5.6.0
- Arm Cortex-M85 cpu support
- Arm China STAR-MC1 cpu support
