[SSL] Add callout about min TLS version and R2 custom domains (cloudflare#17142)

* Add callout about R2 custom domains and adjust fromatting

* Apply suggestion from code review

Co-authored-by: Denise Peña <[email protected]>

---------

Co-authored-by: Denise Peña <[email protected]>

Author: RebeccaTamachiro

src/content/docs/ssl/edge-certificates/additional-options/minimum-tls.mdx

@@ -13,9 +13,7 @@ For example, if TLS 1.1 is selected, visitors attempting to connect using TLS 1.
 
 :::note
 
-If you are looking to restrict cipher suites, refer to [Customize cipher suites](/ssl/edge-certificates/additional-options/cipher-suites/customize-cipher-suites/).
-
-For guidance on which TLS version to use, refer to [TLS protocols](/ssl/reference/protocols/).
+If you are looking to restrict cipher suites, refer to [Customize cipher suites](/ssl/edge-certificates/additional-options/cipher-suites/customize-cipher-suites/). For guidance on which TLS version to use, refer to [TLS protocols](/ssl/reference/protocols/).
 
 :::
 
@@ -35,6 +33,10 @@ If you have an [Advanced Certificate Manager](/ssl/edge-certificates/advanced-ce
 
 ## Setup
 
+:::caution
+The Minimum TLS version that you set up following these steps does not apply to [R2](/r2/) custom domains. To control the TLS version for R2 custom domains, refer to the [custom domains documentation](/r2/buckets/public-buckets/#minimum-tls-version).
+:::
+
 ### Zone-level
 
 To manage the TLS version applied to your whole zone when proxied through Cloudflare: