docs(various): Improve readability. Signed-off-by: Ryan Russell <git@ryanrussell.org>

### Description
Improve readability

# API Reference

```{eval-rst}
.. toctree::
   :maxdepth: 2

   api/js-api.md
   api/python-api.md
   api/micropip-api.md
   api/pyodide-build-cli.md
```

# API Reference

```{eval-rst}
.. toctree::
   :maxdepth: 2

   api/js-api.md
   api/python-api.md
   api/micropip-api.md
   api/pyodide-build-cli.md
```
