internal/breaker: fix typo

Change-Id: Ide24b68e963c2a1ec6264fab07d9c9c8997d5866
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/240010
Reviewed-by: Julie Qiu <julie@golang.org>
diff --git a/internal/breaker/breaker.go b/internal/breaker/breaker.go
index 52e56ea..98e40a7 100644
--- a/internal/breaker/breaker.go
+++ b/internal/breaker/breaker.go
@@ -172,7 +172,7 @@
 }
 
 // succeeded signals that an allowed request has succeeded. The breaker state is
-// changed if necesary.
+// changed if necessary.
 func (b *Breaker) succeeded() {
 	b.buckets[b.cur].successes++
 	b.consecutiveSuccs++