Update README.md (#321)

fix typo

README.md

@@ -6,13 +6,13 @@ This is the next generation of long-range **packet** radio link based on **raw W
 Main features:
 --------------
  - 1:1 map of RTP to IEEE80211 packets for minimum latency (doesn't serialize to byte steam)
- - Smart FEC support (immediately yeild packet to video decoder if FEC pipeline without gaps)
+ - Smart FEC support (immediately yield packet to video decoder if FEC pipeline without gaps)
  - [Bidirectional mavlink telemetry](https://github.com/svpcom/wfb-ng/wiki/Setup-HOWTO). You can use it for mavlink up/down and video down link.
  - IP-over-WFB tunnel support. You can transmit ordinary ip packets over WFB link. Note, don't use ip tunnel for high-bandwidth transfers like video or mavlink. It uses less efficient FEC coding and doesn't aggregate small packets.
  - Automatic TX diversity (select TX card based on RX RSSI)
  - Stream encryption and authentication ([libsodium](https://download.libsodium.org/doc/))
  - Distributed operation. It can gather data from cards on different hosts. So you don't limited to bandwidth of single USB bus.
- - Aggreagation of mavlink packets. Doesn't send wifi packet for every mavlink packet.
+ - Aggregation of mavlink packets. Doesn't send wifi packet for every mavlink packet.
  - Enhanced [OSD](https://github.com/svpcom/wfb-ng-osd) for Raspberry PI (consume 10% CPU on PI Zero) or any other system which
    supports gstreamer (Linux X11, etc). Compatible with any screen resolution. Supports aspect correction for PAL to HD scaling.
  - Provides IPv4 tunnel for generic usage
@@ -128,7 +128,7 @@ If you like WFB-ng you can make a donation to `bitcoin:bc1qfvlsvr0ea7tzzydngq5cf
 
 **Q: Is only Raspberry PI supported?**
 
-**A:** WFB-NG is not tied to any GPU - it operates with UDP packets. But to get RTP stream you need a video encoder (which encodes raw data from camera to x264 stream). In my case RPI is only used for video encoding (becase RPI Zero is too slow to do anything else) and all other tasks (including WFB-NG) are done by other board (NanoPI NEO2).
+**A:** WFB-NG is not tied to any GPU - it operates with UDP packets. But to get RTP stream you need a video encoder (which encodes raw data from camera to x264 stream). In my case RPI is only used for video encoding (because RPI Zero is too slow to do anything else) and all other tasks (including WFB-NG) are done by other board (NanoPI NEO2).
 
 **Q: What is a difference from original wifibroadcast?**