Updates keyboard logs in replay_demos.py (#203)

# Description

This PR updates `replay_demos.py` to print info about specific key press
features rather than the info of the keyboard device class.

## Type of change

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applicable. -->

- Bug fix (non-breaking change which fixes an issue)

## 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
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [ ] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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scripts/tools/replay_demos.py

@@ -138,7 +138,7 @@ def main():
     teleop_interface = Se3Keyboard(pos_sensitivity=0.1, rot_sensitivity=0.1)
     teleop_interface.add_callback("N", play_cb)
     teleop_interface.add_callback("B", pause_cb)
-    print(teleop_interface)
+    print('Press "B" to pause and "N" to resume the replayed actions.')
 
     # Determine if state validation should be conducted
     state_validation_enabled = False