Switches to RSL-RL install from PyPI (#1811)

# Description

Since we now publish PyPI package for rsl-rl with its 2.1.1 release,
this MR modifies the installation to use the PyPI package instead of the
GitHub repository.

Fixes [# (issue)](https://github.com/leggedrobotics/rsl_rl/issues/57)

## Type of change

- 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
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

---------
Co-authored-by: Kelly Guo <kellyguo123@hotmail.com>

VERSION

-2.0.0
+2.0.1

apps/isaaclab.python.headless.kit

@@ -5,7 +5,7 @@
 [package]
 title = "Isaac Lab Python Headless"
 description = "An app for running Isaac Lab headlessly"
-version = "2.0.0"
+version = "2.0.1"
 
 # That makes it browsable in UI with "experience" filter
 keywords = ["experience", "app", "isaaclab", "python", "headless"]

apps/isaaclab.python.headless.rendering.kit

@@ -9,7 +9,7 @@
 [package]
 title = "Isaac Lab Python Headless Camera"
 description = "An app for running Isaac Lab headlessly with rendering enabled"
-version = "2.0.0"
+version = "2.0.1"
 
 # That makes it browsable in UI with "experience" filter
 keywords = ["experience", "app", "isaaclab", "python", "camera", "minimal"]

apps/isaaclab.python.kit

@@ -5,7 +5,7 @@
 [package]
 title = "Isaac Lab Python"
 description = "An app for running Isaac Lab"
-version = "2.0.0"
+version = "2.0.1"
 
 # That makes it browsable in UI with "experience" filter
 keywords = ["experience", "app", "usd"]

apps/isaaclab.python.rendering.kit

@@ -9,7 +9,7 @@
 [package]
 title = "Isaac Lab Python Camera"
 description = "An app for running Isaac Lab with rendering enabled"
-version = "2.0.0"
+version = "2.0.1"
 
 # That makes it browsable in UI with "experience" filter
 keywords = ["experience", "app", "isaaclab", "python", "camera", "minimal"]

apps/isaaclab.python.xr.openxr.kit

@@ -5,7 +5,7 @@
 [package]
 title = "Isaac Lab Python OpenXR"
 description = "An app for running Isaac Lab with OpenXR"
-version = "2.0.0"
+version = "2.0.1"
 
 # That makes it browsable in UI with "experience" filter
 keywords = ["experience", "app", "usd"]

source/isaaclab_rl/setup.py

@@ -44,7 +44,7 @@ EXTRAS_REQUIRE = {
     "sb3": ["stable-baselines3>=2.1"],
     "skrl": ["skrl>=1.4.1"],
     "rl-games": ["rl-games==1.6.1", "gym"],  # rl-games still needs gym :(
-    "rsl-rl": ["rsl-rl-lib@git+https://github.com/leggedrobotics/rsl_rl.git"],
+    "rsl-rl": ["rsl-rl-lib>=2.1.1"],
 }
 # Add the names with hyphens as aliases for convenience
 EXTRAS_REQUIRE["rl_games"] = EXTRAS_REQUIRE["rl-games"]