Please improve the README for multi-paramter routing

[PenguinAndy]

In the README, it mentions that you can pass multiple parameters in the route using colons (:), but there are no examples provided for implementation. After multiple attempts, I found the implementation works as follows:

• Declare the route:

Route("test/:paramA/:paramB") { route in 
    // todo - 
}

• Use it as follows:

NavLink(to: "test/aaa/bbb") { 
    // todo -
}