Use double-l cancelation

x/mongo/driver/topology/rtt_monitor.go

@@ -42,7 +42,7 @@ type rttMonitor struct {
  mu sync.RWMutex // mu guards samples, offset, minRTT, averageRTT, and averageRTTSet
 
  // connMu guards connecting and disconnecting. This is necessary since
- // disconnecting will await the cancelation of a started connection. The
+ // disconnecting will await the cancellation of a started connection. The
  // use case for rttMonitor.connect needs to be goroutine safe.
  connMu sync.Mutex
  samples []time.Duration