[skip ci]Fix allocator init comment typo (#10370)

Signed-off-by: Ngodchen <qingxiang.chen@zilliz.com>

internal/allocator/allocator.go

@@ -85,7 +85,7 @@ func (t *EmptyTicker) Chan() <-chan time.Time {
 	return t.tChan
 }
 
-// Init do nothing.
+// Init does nothing.
 func (t *EmptyTicker) Init() {
 }