DOC-12521 Remove insecure ciphers from docs

Change-Id: I72908e77cdd1dd435b6e49e5a710d285282c976b
Reviewed-on: https://review.couchbase.org/c/couchbase-cli/+/220440
Well-Formed: Restriction Checker
Tested-by: Build Bot <build@couchbase.com>
Reviewed-by: Safian Ali <safian.ali@couchbase.com>

Author: matthallcb

docs/modules/cli/pages/cbcli/couchbase-cli-setting-security.adoc

@@ -78,8 +78,7 @@ include::{partialsdir}/cbcli/part-common-options.adoc[]
 
 --cipher-suites <cipher>::
   Specify the cipher suite to be used across all of the couchbase services.
-  The ciphers have to be a comma separated list such as:
-  `TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA`.
+  The ciphers have to be a comma separated list.
   If an empty string is given ("") then the cipher list will be reset to its default.
 
 --hsts-max-age <seconds>::