typo: 'plateform' -> 'platform' (#12626)

# Objective

- Have even fewer typos.

## Solution

- Fix typos found. In this case, `plateform`.

Co-authored-by: François Mockers <mockersf@gmail.com>

crates/bevy_winit/src/lib.rs

@@ -770,8 +770,8 @@ fn run_app_update_if_should(
             UpdateMode::Reactive { wait } | UpdateMode::ReactiveLowPower { wait } => {
                 // TODO(bug): this is unexpected behavior.
                 // When Reactive, user expects bevy to actually wait that amount of time,
-                // and not potentially infinitely depending on plateform specifics (which this does)
-                // Need to verify the plateform specifics (whether this can occur in
+                // and not potentially infinitely depending on platform specifics (which this does)
+                // Need to verify the platform specifics (whether this can occur in
                 // rare-but-possible cases) and replace this with a panic or a log warn!
                 if let Some(next) = runner_state.last_update.checked_add(*wait) {
                     event_loop.set_control_flow(ControlFlow::WaitUntil(next));