`-c STS` is almost meaningless when the latest major release is an LTS (e.g. .NET 8)

I believe that the `-c STS` option should consider both STS and LTS releases, rather than focusing exclusively on STS. Alternatively, there could be a different mode that selects the newer version between STS and LTS.

Currently, `-c LTS` (the default) installs SDK 8.0.100, while `-c STS` installs 7.0.404. It seems more practical to use `-c 8.0` etc. and update the channel IDs once a year, if `-c STS` does not automatically choose the latest major release channel.

While the current approach might align with the distribution method of release files on Azure CDN, it's not particularly convenient for the script users.