message: docs: fix listener TLS typo
diff: @@ -51,7 +51,7 @@ verify_certificate_hash
  verify_subject_alt_name
  *(optional, array)* An optional list of subject alt names. If specified, Envoy will verify
  - that the server certificate's subject alt name matches one of the specified values.
  + that the client certificate's subject alt name matches one of the specified values.
  cipher_suites
  *(optional, string)* If specified, the TLS listener will only support the specified `cipher list
  