It's a major upgrade so it deserves leading 1, but it's still HardFork 24.
It's like that:

 +--- major
   ^  ^--- patch (updates within given hardfork version, security patches, improvements)
   +--- minor (equals to hardfork number)

Oh, okay. Thanks. I was under the impression all other numbers reset to 0 after a major version upgrade.

Yes, in normal versioning it's usually like that.
We are not normal ;-)
(All because that "minor" being equal to HF number, we wanted to keep that)