Update sky.com

sites/sky.com/readme.md

@@ -0,0 +1,21 @@
+# sky.com
+
+https://www.sky.com/tv-guide
+
+### Download the guide
+
+```sh
+npm run grab -- --site=sky.com
+```
+
+### Update channel list
+
+```sh
+npm run channels:parse -- --config=./sites/sky.com/sky.com.config.js --output=./sites/sky.com/sky.com.channels.xml
+```
+
+### Test
+
+```sh
+npm test -- sky.com
+```