Updated release-notes for F-Droid.

fastlane/metadata/android/en-US/changelogs/19.txt

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+Updated core library to 0.5.9, presenting these changes:
+
+Changed
+The routing algorithm has been updated with RTT-aware link costing, which should prefer lower latency links over higher latency links where possible
+The calculated cost is an average of the link RTT, but newly established links are costed higher to begin with, such that unstable peerings can be avoided
+Link costs are only used where multiple next-hops are available and will be ignored if there is only one loop-free path to the destination
+This is protocol-compatible with existing v0.5.x nodes but will have the best results when peering with nodes that are also running the latest version
+The getPeers endpoint will now report the calculated link cost for each given peer
+Upgrade dependencies
+
+Fixed
+Multicast discovery should now work again when building Yggdrasil as an Android framework
+Multicast discovery will now correctly ignore interfaces that are not marked as running
+Ephemeral links, such as those added by multicast, will no longer try to reconnect in a fast loop, fixing a high CPU issue
+The TUN interface will no longer stop working when hitting a segment read error from vectorised reads
+The AllowedPublicKeys option will once again no longer apply to multicast peerings, as was originally intended
+A potential panic when shutting down peering links has been fixed
+A redundant system call for setting MTU on OpenBSD has been removed
+
+Fixes in Android app
+Fixed occasional crash on start/stop
+Updated some dependencies
+Updated Android API to 34