Add forgetting dash

Co-authored-by: RD WebDesign <github@rdwebdesign.com.br>
Signed-off-by: yubiuser <ckoenig@posteo.de>

automated install/basic-install.sh

@@ -173,7 +173,7 @@ os_check_dig(){
     local nameserver="$3"
     local response
 
-    response="$(dig "${protocol}" +short -t txt "${domain}" "${nameserver}" 2>&1
+    response="$(dig -"${protocol}" +short -t txt "${domain}" "${nameserver}" 2>&1
     echo $?
     )"
     echo "${response}"