fix(effect): respect times: 0 in Effect.retry options (#5924)

Author: mikearnaldi

.changeset/fix-schedule-retry-times-zero.md

@@ -0,0 +1,5 @@
+---
+"effect": patch
+---
+
+Fix `Effect.retry` to respect `times: 0` option by using explicit undefined check instead of truthy check.

packages/effect/src/internal/schedule.ts

@@ -2034,7 +2034,7 @@ export const fromRetryOptions = (options: Effect.Retry.Options<any>): Schedule.S
       return scheduleDefectWrap(applied)
     }) :
     withWhile
-  return options.times ?
+  return options.times !== undefined ?
     intersect(withUntil, recurs(options.times)) :
     withUntil
 }