Fix typo

[smortex]

Quoting https://en.wikipedia.org/wiki/Coordinated_Universal_Time#Etymology

The official abbreviation for Coordinated Universal Time is UTC. This abbreviation comes as a result of the International Telecommunication Union and the International Astronomical Union wanting to use the same abbreviation in all languages.[4] The compromise that emerged was UTC,[5] which conforms to the pattern for the abbreviations of the variants of Universal Time (UT0, UT1, UT2, UT1R, etc.).[6]