Fixes benchmark script import for RSL RL (#248)

# Description

Fixes benchmark script import for RSL RL

## Type of change

<!-- As you go through the list, delete the ones that are not
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
- [x] 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

<!--
As you go through the checklist above, you can mark something as done by
putting an x character in it

For example,
- [x] I have done this task
- [ ] I have not done this task
-->

scripts/benchmarks/benchmark_rsl_rl.py

@@ -13,11 +13,13 @@
 """Launch Isaac Sim Simulator first."""
 
 import argparse
+import os
 import sys
 import time
 
 from isaaclab.app import AppLauncher
 
+sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), "../.."))
 import scripts.reinforcement_learning.rsl_rl.cli_args as cli_args  # isort: skip
 
 # add argparse arguments
@@ -63,7 +65,6 @@ imports_time_begin = time.perf_counter_ns()
 
 import gymnasium as gym
 import numpy as np
-import os
 import torch
 from datetime import datetime
 
@@ -85,8 +86,6 @@ from isaacsim.core.utils.extensions import enable_extension
 enable_extension("isaacsim.benchmark.services")
 from isaacsim.benchmark.services import BaseIsaacBenchmark
 
-sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), "../.."))
-
 from isaaclab.utils.timer import Timer
 from scripts.benchmarks.utils import (
     log_app_start_time,