Update SSO configuration domain steps (#18554)

* remove repeated step and update callout styling

* consistent capitalization

layouts/shortcodes/admin-domains.html

@@ -16,7 +16,7 @@
 1. Sign in to {{ $product_link }}.
 2. {{ $domain_navigation }}
 3. Select **Add a domain**.
-3. Continue with the on-screen instructions to get a verification code for
+4. Continue with the on-screen instructions to get a verification code for
    your domain as a **TXT Record Value**.
 
    > **Note**
@@ -27,19 +27,16 @@
    > `yourcompany.example` and `us.yourcompany.example`. Public domains such as
    > `gmail.com`, `outlook.com`, etc. aren’t permitted.
 
-5. Once you have waited 72 hours for the TXT Record verification,
-   you can then select **Verify** next to the domain you've added,
-   and follow the on-screen instructions.
-
-   > **Note**
+   > **Tip**
    >
    > Make sure that the TXT record name that you create on your DNS matches
    > the domain you registered on Docker in Step 4. For example,
    > if you registered the subdomain `us.yourcompany.example`,
    > you need to create a TXT record within the same name/zone `us`.
    > A root domain such as `yourcompany.example` needs a TXT record on the
    > root zone, which is typically denoted with the `@` name for the record.
+   { .tip }
 
-6. Once you have waited 72 hours for the TXT record verification,
+5. Once you have waited 72 hours for the TXT record verification,
    you can then select **Verify** next to the domain you've added,
    and follow the on-screen instructions.