Prepare patch release: bump Trio to 0.8.1

Config.xcconfig

@@ -18,8 +18,8 @@ BUNDLE_IDENTIFIER = org.nightscout.$(DEVELOPMENT_TEAM).trio
 TRIO_APP_GROUP_ID = group.org.nightscout.$(DEVELOPMENT_TEAM).trio.trio-app-group
 
 // The developers set the version numbers, please leave them alone
-APP_VERSION = 0.8.0
-APP_DEV_VERSION = 0.8.0
+APP_VERSION = 0.8.1
+APP_DEV_VERSION = 0.8.1
 APP_BUILD_NUMBER = 1
 COPYRIGHT_NOTICE =