Update proposals/NNNN-ClockEpochs.md

Co-authored-by: Ben Rimmington <[email protected]>

Author: phausler

proposals/NNNN-ClockEpochs.md

@@ -36,7 +36,7 @@ extension SuspendingClock {
 These can be used to gather information like for example the uptime of a system, or the active time of a system;
 
 ```swift
-let clock = ContinousClock()
+let clock = ContinuousClock()
 let uptime = clock.now - clock.systemEpoch
 ```