Fix version detection

upgradeNextcloud.sh

@@ -43,7 +43,7 @@ if [ $MAINTENANCE_LEVEL == "upgrade" ]
 then
     echo "Checking version  from changelog page (upgrade)"
     target_version=`curl -silent https://nextcloud.com/changelog/ \
-        | sed 's/>/>\n/g' | awk '/^<h3 id=/{print $2}' | head -n 1 \
+        | sed 's/>/>\n/g' | awk '/^\s*<h3 id=/{print $2}' | head -n 1 \
         | sed -e 's/id="\(.*\)">/\1/' -e 's/-/./g'`
 else
     echo "Checking version  from install page (security)"