minor typo fixes

Created by: bparth24

• https://spec-untp-fbb45f.opensource.unicc.org/docs/about/Requirements
  • Correction — Identity Anchors in the table TI.02 (removed the round bracket at the end)
• https://spec-untp-fbb45f.opensource.unicc.org/docs/about/References
  • Correction — ISO-50940 corrected to ISO-59040

@onthebreeze PR created for minor typo fixes.