Redundant code in character controller offset example

[softmoth]

docs/user_guides/bevy_plugin/character_controller#character-offset has two copies of the same code, with slightly different comments. Probably a merge gone wrong.

/* Configure the character controller when the collider is created. */
commands.spawn(Collider::ball(0.5))
    .insert(KinematicCharacterController {
        // The character offset is set to 0.01.
        offset: CharacterLength::Absolute(0.01),
        ..default()
    });

commands.spawn(Collider::ball(0.5))
    .insert(KinematicCharacterController {
        // The character offset is set to 0.01 multiplied by the collider’s height.
        offset: CharacterLength::Absolute(0.01),
        ..default()
    });

[Vrixyz]

The second offset is now Relative, thanks !