Figure caption on `css-vs-js-ease.svg`

[u-sho]

This is at https://v3.vuejs.org/guide/transitions-overview.html#easing

The CSS - limited handles caption is broken.

[u-sho]

I think that these <tspan> tags make it wrong.

[sdras]

This seems like it's fixed. I can also give it another cleanup pass in another PR. Thanks!