[Bug]: discarded calculations in get_links_acc

[tstastny]

trafficstars

Bug Description

I'm not sure if this was just for debugging when originally writing the PR, and simply forgotten to delete, or an oversight and calculation bug now, but noticed it and want to check. In the for loop of _kernel_get_links_acc(): https://github.com/ethz-asl/omav_genesis/blob/090ad078151c6a8c14a2d37e1682c4fb544ea327/genesis/engine/solvers/rigid/rigid_solver_decomp.py#L4096-L4099

final_acc = acc + correction
final_acc = self.links_state[i_l, i_b].cdd_vel

This came in with #451 @YilingQiao @zswang666

Steps to Reproduce

Nothing to reproduce, is in code.

Expected Behavior

Should return the current link acceleration.

Screenshots/Videos

No response

Relevant log output

Environment

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Release version or Commit ID

https://github.com/Genesis-Embodied-AI/Genesis/commit/135f9a0aed652d1d1facf2f3c9c612898300fa41

Additional Context

No response