discovery (backoff): fix typo in comment (#2214)

p2p/discovery/backoff/backoff.go

@@ -26,7 +26,7 @@ type BackoffStrategy interface {
 // Jitter must return a duration between min and max. Min must be lower than, or equal to, max.
 type Jitter func(duration, min, max time.Duration, rng *rand.Rand) time.Duration
 
-// FullJitter returns a random number uniformly chose from the range [min, boundedDur].
+// FullJitter returns a random number, uniformly chosen from the range [min, boundedDur].
 // boundedDur is the duration bounded between min and max.
 func FullJitter(duration, min, max time.Duration, rng *rand.Rand) time.Duration {
 	if duration <= min {