fix: update during setWeight: 100 could cause 503 errors

rollout/trafficrouting.go

@@ -262,7 +262,7 @@ func (c *rolloutContext) reconcileTrafficRouting() error {
 			}
 		}
 
-		if !c.checkReplicasAvailable(c.stableRS, 100-desiredWeight) {
+		if !c.checkReplicasAvailable(c.stableRS, weightutil.MaxTrafficWeight(c.rollout)-desiredWeight) {
 			return nil
 		}
 		// We need to check for revision > 1 because when we first install the rollout we run step 0 this prevents that.