Update readme.md - Regular sync rsync script had mistake

docker command with -it cannot re run as cronjob - getting error that "Device is no TTY"

Signed-off-by: foegra <[email protected]>

readme.md

@@ -608,7 +608,7 @@ rm "$TARGET_DIRECTORY/aio-lockfile"
 umount "$DRIVE_MOUNTPOINT"
 
 if docker ps --format "{{.Names}}" | grep "^nextcloud-aio-nextcloud$"; then
-    docker exec -it nextcloud-aio-nextcloud bash /notify.sh "Rsync backup successful!" "Synced the backup repository successfully."
+    docker exec -i nextcloud-aio-nextcloud bash /notify.sh "Rsync backup successful!" "Synced the backup repository successfully."
 else
     echo "Synced the backup repository successfully."
 fi