Update README.md

Author: PaulZC

README.md

@@ -84,7 +84,7 @@ Documentation
 * **[CONTRIBUTING.md](./CONTRIBUTING.md)** - guidance on how to contribute to this library.
 * **[Installing an Arduino Library Guide](https://learn.sparkfun.com/tutorials/installing-an-arduino-library)** - OLA includes a large number of libraries that will need to be installed before compiling will work.
 * **[ADDING_SENSORS.md](./ADDING_SENSORS.md)** - contains _abbreviated_ instructions on how to add a new sensor to the OLA firmware. It's more of an aide-memoire really... Sorry about that.
-* **[COMPILE_BINARY.md](./COMPILE_BINARY.md)** - contains _abbreviated_ instructions on how to compile the OLA firmware binary manually. It's also an aide-memoire really... Sorry about that.
+* **[COMPILE_BINARY.md](./COMPILE_BINARY.md)** - contains instructions on how to compile the OLA firmware binary manually using Docker.
 * **[SENSOR_UNITS.md](./SENSOR_UNITS.md)** - contains a summary of the units used for each sensor measurement.
 
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