Update v7.3.1 changelog

app/src/main/res/raw/changelog.md

@@ -1,4 +1,4 @@
-# v7.3.0
-- **HUGE** code base modernization, thanks @diareuse!
-- Reboot device using proper API (no more abrupt reboot)
-- New floating button in Magisk logs to go to bottom
+# v7.3.1
+- Fix blank Superuser fragment under some circumstances
+- Fix incomplete repo database bug: if you experience this issue from the old version, go to Settings → Clear Repo Cache and refresh the Download fragment
+- Fix crashing when pressing fast scrolling button when logs are empty