Fixes test_modify_env_param_curr_term (#2950)

This PR fixes the bug in the test `test_modify_env_param_curr_term`
```
    modify_reset_joint_pos = CurrTerm(
        func=mdp.modify_term_cfg,
        params={
            "address": "events.reset_pole_position.params.position_range", <------
            "modify_fn": replace_value,
            "modify_params": {"value": (-0.0, 0.0), "num_steps": 1},
        },
    )
```

it is trying to modify `events.reset_**pole**_position`

but in the assertion, it is checking `events.reset_**cart**_position`

```
joint_ids = env.event_manager.cfg.reset_cart_position.params["asset_cfg"].joint_ids
assert torch.all(robot.data.joint_pos[:, joint_ids] == 0.0)
```

it wasn't an error before because reset_joints_by_offset function was
buggy, and the tests suite passed before right before that bug was
fixed. Now that bug fixed, we found out this bug.

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## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
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---------
Signed-off-by: Kelly Guo <kellyg@nvidia.com>
Signed-off-by: ooctipus <zhengyuz@nvidia.com>
Co-authored-by: Kelly Guo <kellyg@nvidia.com>
Co-authored-by: Kelly Guo <kellyguo123@hotmail.com>

source/isaaclab/test/envs/test_modify_env_param_curr_term.py

@@ -47,7 +47,7 @@ class CurriculumsCfg:
     modify_reset_joint_pos = CurrTerm(
         func=mdp.modify_term_cfg,
         params={
-            "address": "events.reset_pole_position.params.position_range",
+            "address": "events.reset_cart_position.params.position_range",
             "modify_fn": replace_value,
             "modify_params": {"value": (-0.0, 0.0), "num_steps": 1},
         },