Update bevy_ecs requirement from 0.14 to 0.15

Updates the requirements on [bevy_ecs](https://github.com/bevyengine/bevy) to permit the latest version.
- [Release notes](https://github.com/bevyengine/bevy/releases)
- [Commits](bevyengine/bevy@v0.14.0...v0.15.0)

---
updated-dependencies:
- dependency-name: bevy_ecs
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

rust_crate/Cargo.toml

@@ -13,7 +13,7 @@ show-backtrace = ["backtrace"]
 bevy = ["bevy_ecs"]
 
 [dependencies]
-bevy_ecs = { version = "0.14", optional = true }
+bevy_ecs = { version = "0.15", optional = true }
 
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
 allo-isolate = "0.1.26"