message: minor: fix formatting of uri in configuration page
diff: @@ -18,9 +18,7 @@ additional connection options are possible via the
  To enable TLS (SSL), set `ssl=true` in the URI:
  -```nohighlight
  -mongodb://mongodb.example.com/?ssl=true
  -```
  +> `mongodb://mongodb.example.com/?ssl=true`
  By default, mongocxx will verify server certificates against the local
  system CA list. You can override that by creating a
  