Modifies main title of the HOVER tutorial (#328)

# Description

Modifies the title of the deployment section in the documentation to
include mention of sim2real.

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## Type of change

- This change requires a documentation update

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## Checklist

- [ ] 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
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- [ ] 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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docs/source/policy_deployment/index.rst

-Deploying a Policy Trained in Isaac Lab
-=======================================
+Sim2Real Deployment of Policies Trained in Isaac Lab
+====================================================
 
 Welcome to the Policy Deployment Guide! This section provides examples of training policies in Isaac Lab and deploying them to both simulation and real robots.