Add intro post for BNO055 driver

In according to the rules, drivers should come with announcement posts

README.md

@@ -300,7 +300,7 @@ have achieved the "released" status (published on crates.io + documentation / sh
 15. [BlueNRG] - SPI - driver for BlueNRG-MS Bluetooth module - [Intro post][15] ![crates.io](https://img.shields.io/crates/v/bluenrg.svg)
 16. [shared-bus] - I2C - utility driver for sharing a bus between multiple devices - [Intro post][16] ![crates.io](https://img.shields.io/crates/v/shared-bus.svg)
 17. [TMP006] - I2C - Contact-less infrared (IR) thermopile temperature sensor driver - [Intro post][17] ![crates.io](https://img.shields.io/crates/v/tmp006.svg)
-18. [BNO055] - I2C - Bosch Sensortec BNO055 9-axis IMU driver ![crates.io](https://img.shields.io/crates/v/bno055.svg)
+18. [BNO055] - I2C - Bosch Sensortec BNO055 9-axis IMU driver - [Intro post][18] ![crates.io](https://img.shields.io/crates/v/bno055.svg)
 
 [L3GD20]: https://crates.io/crates/l3gd20
 [LSM303DLHC]: https://crates.io/crates/lsm303dlhc
@@ -351,6 +351,7 @@ have achieved the "released" status (published on crates.io + documentation / sh
 [17]: https://blog.eldruin.com/tmp006-contact-less-infrared-ir-thermopile-driver-in-rust/
 
 [BNO055]: https://crates.io/crates/bno055
+[18]: https://www.reddit.com/r/rust/comments/ao4sqq/embeddedhal_bno055_9axis_imu_driver/
 
 *NOTE* You may be able to find even more driver crates by searching for the [`embedded-hal-driver`]
 keyword on crates.io!