Document changes and release 39pureos2

debian/changelog

+librem5-base (39pureos2) byzantium; urgency=medium
+
+  [ Dorota Czaplejewicz ]
+  * USB gadget: Expose an ethernet and a serial device over gadgetfs.
+    This functionality was previously in the librem5-devkit repository,
+    but it's moved here because it's not specific to the dev kit.
+    At the same time, gadgetfs is a more flexible way to do it than g_multi.
+
+ -- Guido Günther <agx@sigxcpu.org>  Mon, 30 Aug 2021 14:44:19 +0200
+
 librem5-base (39pureos1) byzantium; urgency=medium
 
   [ Guido Günther ]