refactor(ripple): use new switch-case syntax in example 2-6

[tijnjh]

ripple recently added support for switch case syntax, i thought it would make sense to use those in this example :)

[matschik]

Hi @tijnjh ! The purpose of the snippet "Conditional" is to mainly how to do if... else since it's used more frequently than switch. Since other snippets do not use switch, we must avoid to keep a better comparison between syntaxes.