release notes: updated with actual state

Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com>

RELEASES.md

@@ -22,6 +22,32 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
     -   U-Blox Module Driver
 
 
+## [Sprint 20.4] - 2021-01-08
+
+### Added
+- [69468] hw25: Added support for 2nd ethernet port
+
+### Changed
+- [65220] boottime: improved boot time by:
+    - [67745] optimize the user module config service (remove sleep)
+
+### Fixed
+- [65928] Set custom mac addresses only for VCU distribution
+- [69354] Fixed modem power state after flashing an image
+
+### Known Issues:
+- [65740] gnss-mgr: very rarely service does not start
+- gnss-mgr: navigation does not immediately resume after a system restart in a 2D dead reckoning situation without GNSS reception.
+    - navigation only resumes once GNSS reception is possible again
+    - typical scenario is parking a vehicle in an underground parking lot/parking lot with no GNSS reception
+- ostree: update may fail if there is not enough space on root partition
+    - workaround: free space used by log files
+    - \# journalctl --rotate
+    - \# journalctl --vacuum-time 1s
+- [63349] ostree: when using a partition overlay, some files may remain over update and create incompatibilities with new version
+- [65420] tibluetooth: Fix service stop
+
+
 ## [Sprint 20.3] - 2020-12-11
 Analyzed PEN-Test results