[KO] Update 1/19 contents People/Tournament_Committee

[Chronicler01]

Self-check

• The changes are tested against the contribution checklist
• (translations only) The changes are reviewed on GitHub by a fluent speaker

[osu-wiki-observatory]

Your translation may be missing new information from corresponding English articles. Please update your translation according to the merged changes:

• Move WalterToro to Alumni in Tournament Committee #12733, files:
  • wiki/People/Tournament_Committee/en.md

[osu-wiki-observatory]

Your translation may be missing new information from corresponding English articles. Please update your translation according to the merged changes:

• Move _yosh to Alumni in Tournament Committee #12769, files:
  • wiki/People/Tournament_Committee/en.md

[sylphi]

Translation is fine. However, You need to apply #12769

[osu-wiki-observatory]

Your translation may be missing new information from corresponding English articles. Please update your translation according to the merged changes:

• Add Tournament Committee user group and pluralise the User_groups page #12800, files:
  • wiki/People/Tournament_Committee/en.md