Merge pull request #29 from hamishwillee/sdk

Add SDK to sidebar

Author: hamishwillee

en/SUMMARY.md

@@ -27,4 +27,5 @@
 * [PX4 User Guide](https://docs.px4.io/en/)
 * [QGroundControl User Guide](https://docs.qgroundcontrol.com/en/)
 * [QGroundControl Developer Guide](https://dev.qgroundcontrol.com/en/)
-* [MAVLink Developer Guide](https://mavlink.io/en/)
+* [MAVLink Guide](https://mavlink.io/en/)
+* [Dronecode SDK](https://sdk.dronecode.org/en/)