Update sponsorship information

[bact]

Review the sponsorship information and update it.

1. Does airesearch.in.th still sponsor Korakot and Lalita ? If not, when it was finished? Update the year (from "Since 2019" to "From 2019 to 20xx").

2. Do we still use the Mac Mini M1 from MacStadium in our CI? If not, acknowledge the sponsorship by saying "From 20xx to 20xx, macOS on ARM testing has been conducted on a Mac Mini M1 machine sponsored by MacStadium.""