Use different bucket if it is a PATCH request

I'm still not 100% sure if this is how Discord's rate limits for this patch really works because rate limits are very confusing to me, but I'm like, 99% sure

lib/bucketpath.go

@@ -89,7 +89,7 @@ func GetOptimisticBucketPath(url string, method string) string {
 	// ! stands for any replaceable id
 	switch parts[0] {
 	case MajorChannels:
-		if numParts == 2 {
+		if numParts == 2 && method != "PATCH" {
 			// Return the same bucket for all reqs to /channels/id
 			// In this case, the discord bucket is the same regardless of the id
 			bucket.WriteString(MajorChannels)
@@ -196,4 +196,4 @@ func GetOptimisticBucketPath(url string, method string) string {
 	}
 
 	return bucket.String()
-}
+}