update to bevy 0.15 rc

Signed-off-by: Schmarni <marnistromer@gmail.com>

crates/bevy_webxr/Cargo.toml

@@ -12,11 +12,11 @@ bevy.workspace = true
 
 # all dependencies are placed under this since on anything but wasm, this crate is completely empty
 [target.'cfg(target_family = "wasm")'.dependencies]
-thiserror = "1.0.57"
-wgpu = "0.19.3"
-wgpu-hal = "0.19.3"
+thiserror.workspace = true
+wgpu.workspace = true
+wgpu-hal.workspace = true
 
-bevy_mod_xr = { path = "../bevy_xr", version = "0.1.0-rc1" }
+bevy_mod_xr.workspace = true
 
 [lints.clippy]
 too_many_arguments = "allow"