Fixes a small formatting error in the docs (#3887)

# Description

One of the links in the docs didn't have the correct syntax to render
correctly. A small fix to fix the syntax.

## Type of change

- Documentation update

## Screenshots

Before
<img width="1895" height="265" alt="image"
src="https://github.com/user-attachments/assets/f6db07a1-7302-4bbb-963e-d371c29259d5"
/>

After
<img width="1942" height="270" alt="image"
src="https://github.com/user-attachments/assets/c7f7fc40-64d8-4c9b-adaf-7c62736e65e3"
/>

## Checklist

- [x] I have read and understood the [contribution
guidelines](https://isaac-sim.github.io/IsaacLab/main/source/refs/contributing.html)
- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] 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

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Author: kellyguo11

README.md

@@ -56,7 +56,7 @@ dependency versions for Isaac Sim.
 
 | Isaac Lab Version             | Isaac Sim Version         |
 | ----------------------------- | ------------------------- |
-| `main` branch                 | Isaac Sim 4.5 / 5.0       |
+| `main` branch                 | Isaac Sim 4.5 / 5.0 / 5.1 |
 | `v2.3.X`                      | Isaac Sim 4.5 / 5.0 / 5.1 |
 | `v2.2.X`                      | Isaac Sim 4.5 / 5.0       |
 | `v2.1.X`                      | Isaac Sim 4.5             |

docs/source/setup/installation/index.rst

@@ -83,7 +83,7 @@ Other notable limitations with respect to Isaac Lab include...
 #. Extended reality teleoperation tools such as `OpenXR <https://isaac-sim.github.io/IsaacLab/release/2.3.0/source/api/lab/isaaclab.devices.html#openxr>`_ is not supported. This is due
    to encoding performance limitations that have not yet been fully investigated.
 
-#. SKRL training with JAX <https://docs.jax.dev/en/latest/notebooks/thinking_in_jax.html>_ has not been explicitly validated or tested in Isaac Lab on the DGX Spark.
+#. SKRL training with `JAX <https://docs.jax.dev/en/latest/notebooks/thinking_in_jax.html>`_ has not been explicitly validated or tested in Isaac Lab on the DGX Spark.
    JAX provides pre-built CUDA wheels only for Linux on x86_64, so on aarch64 systems (e.g., DGX Spark) it runs on CPU only by default.
    GPU support requires building JAX from source, which has not been validated in Isaac Lab.