c-ares update script broken by c-ares 1.30.0

[targos]

https://github.com/nodejs/node/actions/runs/9432585021/job/25982541819

https://github.com/c-ares/c-ares/releases/tag/v1.30.0

[richardlau]

The tag names have changed. They used to be of the form:

• cares-1_29_0

i.e. prefixed with cares- and the numerical parts of the version separated with _.
For c-ares 1.30.0 the tag is v1.30.0. Assuming the tags now follow this format we could update the update script to drop the leading v (and the replacement of _ with . is no longer necessary) as a quick fix.

The correct thing to do is probably to parse the assets out of https://api.github.com/repos/c-ares/c-ares/releases/latest instead of just the tag_name which would give the actual URLs without the update script having to make assumptions as to the format of the download URL (for example, the download URL contains the leading v for the tag).