quick fix for when dig also returns a CNAME

Signed-off-by: ryrun <ryrun@online.de>

gravity.sh

@@ -349,7 +349,7 @@ gravity_DownloadBlocklistFromUrl() {
     else
         printf -v port "%s" "${PIHOLE_DNS_1#*#}"
     fi
-    ip=$(dig "@${ip_addr}" -p "${port}" +short "${domain}")
+    ip=$(dig "@${ip_addr}" -p "${port}" +short "${domain}" | tail -1)
     if [[ $(echo "${url}" | awk -F '://' '{print $1}') = "https" ]]; then
       port=443;
     else port=80