Equation label misaligned

[akhmerov]

Describe the bug

Equation labels appear at a different height than the equations themselves

To Reproduce

Steps to reproduce the behavior:

1. Go to https://myst-parser.readthedocs.io/en/latest/using/syntax.html#equation-eqn-best
2. Observe the following alignment:

Expected behavior

Not a typesetting expert, but I think the label should have the same baseline.

Environment

Ubuntu + chrome & firefox (I observe problem on both)

Additional context

Not sure what's the best way to approach this, but adjusting span.eqno css seems appropriate.