safety lint in bevy_reflect on wasm

[mockersf]

Objective

• cargo clippy --target wasm32-unknown-unknown -p bevy_reflect --no-deps -- -D warnings fail with

error: unsafe block missing a safety comment
   --> crates/bevy_reflect/src/lib.rs:804:21
    |
804 |                     unsafe {
    |                     ^^^^^^^^
    |

Solution

• Change the order between the lint and the safety comment