Fix default DNS comment

Author: angristan

wireguard-install.sh

@@ -160,7 +160,7 @@ function installQuestions() {
 		read -rp "Server WireGuard port [1-65535]: " -e -i "${RANDOM_PORT}" SERVER_PORT
 	done
 
-	# Adguard DNS by default
+	# Cloudflare DNS by default
 	until [[ ${CLIENT_DNS_1} =~ ^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$ ]]; do
 		read -rp "First DNS resolver to use for the clients: " -e -i 1.1.1.1 CLIENT_DNS_1
 	done