Guide example does not compile due to cubecl update

[shinglyu]

Describe the bug

The examples/guide does not compile because of an updated parameter type in the cubecl dependency.

To Reproduce

1. cd examples/guide
2. cargo run --bin train --release

Expected behavior
The example compiles and runs.

Screenshots
Got multiple compile errors like this:
error[E0308]: mismatched types
--> crates/burn-jit/src/fusion/elemwise/kernel.rs:98:84
|
98 | let cube_count = calculate_cube_count_elemwise(num_elems / factor, self.cube_dim);
| ----------------------------- ^^^^^^^^^^^^^ expected usize, found CubeDim
| |
| arguments to this function are incorrect
|
note: function defined here
--> /home/sagemaker-user/.cargo/git/checkouts/cubecl-aa41a28b39b598f9/2b95a9e/crates/cubecl-core/src/lib.rs:55:8
|
55 | pub fn calculate_cube_count_elemwise<S: ComputeServer>(
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

**Desktop (please complete the following information):**
 - OS: Ubuntu 22.04.4 LTS (in SageMaker Studio CodeEditor)
 - Browser: N/A
 - Version: N/A

**Additional context**
cubecl was updated 5 days ago: https://github.com/tracel-ai/cubecl/commit/367bd4c38ae16bb4660a60399bbb4a4c95e02755 with this breaking change. But a `cargo update cubecl` does not seem to fix it.

[shinglyu]

Root cause: tracel-ai/cubecl#44

[nathanielsimard]

We fixed the problem by setting the correct version of burn: eb9e822

Since CubeCL is early we won't create a release for every breaking changes, only when publishing Burn, so that both project can evolve together.