Updated link to Koreader forum

Home.md

@@ -63,7 +63,7 @@ You can open new issues on the [issue tracker][issue-tracker]. There are related
 * [[KOReader Forum | http://www.mobileread.com/forums/forumdisplay.php?f=276]]
 * [[KOReader for Android devices | http://www.mobileread.com/forums/showthread.php?t=240617]]
 * [[KOReader for Cervantes devices | http://www.mobileread.com/forums/showthread.php?t=311571]]
-* [[KOReader for Kindle devices | http://www.mobileread.com/forums/showthread.php?t=209276]]
+* [[KOReader for Kindle devices | https://www.mobileread.com/forums/forumdisplay.php?f=276]]
 * [[KOReader for Kobo devices | http://www.mobileread.com/forums/showthread.php?t=216960]]
 * [[KOReader for PocketBook devices | http://www.mobileread.com/forums/showthread.php?t=254659]]
 * [[Mailing list | https://www.freelists.org/list/koreader]]