This ignores 2.x.1 (etc) releases, which prevents it from thinking
the next official non-point-release version is 2.26.1, when it
should be 2.26.0, because it saw the "latest" release is 2.24.1.
This fixes the wiki ending up with imaginary version numbers for
the "this function is available since SDL 2.x.y" sections.
Fixes#6343.