Merge pull request #192 from testwill/typo

fix: typo

docs/design.md

@@ -1,7 +1,7 @@
 # Overview
 
 The vFlow project is an enterprise IPFIX and sFlow collector. it produces the decoded samples to a message bus like Kafka
-or NSQ. The vFlow is high performance and scaleable, It can be able to grow horizontally (each node can talk through RPC
+or NSQ. The vFlow is high performance and scalable, It can be able to grow horizontally (each node can talk through RPC
 to find out any missed IPFIX template). there is cloning IPFIX UDP packet feature with spoofing in case you need to have
 the IPFIX raw data somewhere else.