Set changelog release version to 3.0.9

Author: markusforrer

CANoopEn

@@ -13,7 +13,7 @@ covers the samples.
 
 ## [Unreleased]
 
-## [3.0.1] - 2026-08-10
+## [3.0.9] - 2026-08-10
 
 ### Changed
 
@@ -23,7 +23,7 @@ covers the samples.
   tick instead of on the call cadence of the main loop or of the scheduler task. Under FreeRTOS
   the tick count is incremented by the RTOS tick hook, so the same driver serves both the
   bare-metal and the RTOS samples.
-- `CANoopEn` submodule updated to the stack of release 3.0.1.
+- `CANoopEn` submodule updated to the stack of release 3.0.9.
 
 ## 3.0 - 2026-08-07
 
@@ -39,5 +39,5 @@ Initial public release of the samples alongside the stack.
   EDS files by [Eds2Od](https://github.com/xyntos-ch/CANoopEnTools).
 
 [CO-7]: https://CANoopEn.net/configuration/#time-base
-[Unreleased]: https://github.com/xyntos-ch/CANoopEnDemo/compare/3.0.1...develop
-[3.0.1]: https://github.com/xyntos-ch/CANoopEnDemo/releases/tag/3.0.1
+[Unreleased]: https://github.com/xyntos-ch/CANoopEnDemo/compare/3.0.9...develop
+[3.0.9]: https://github.com/xyntos-ch/CANoopEnDemo/releases/tag/3.0.9