"invalid escape sequence" warning in `BoxOSQP` docstring

Kind of a minor issue, but the lines

https://github.com/google/jaxopt/blob/501cc208c2493395fbe8026b963e7867397403db/jaxopt/_src/osqp.py#L333-L336

in the `BoxOSQP` docstring cause a `DeprecationWarning: invalid escape sequence '\m'`. Would changing them to

```
Dual Ineq variables: :math:`\\mu, \\phi`

ADMM computes :math:`y` at each iteration. :math:`\\mu` and :math:`\\phi` can be deduced from :math:`y`.
```

fix that while leaving the proper docstring in tact?

There is also another mistake in the same docstring:

https://github.com/google/jaxopt/blob/501cc208c2493395fbe8026b963e7867397403db/jaxopt/_src/osqp.py#L318

Here ``` ``jnp.inf ``` does not have a closing ``` `` ```.