Fix markdown lint issues

- Use 1/1/1 ordered list style per markdownlint rules
- Use proper µT symbol for microtesla

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: iret33

content/components/sensor/bno055.md

@@ -150,11 +150,11 @@ sensor:
 
 ### Magnetometer
 
-- **mag_x** (*Optional*): Magnetic field X-axis in microtesla (uT). All options from
+- **mag_x** (*Optional*): Magnetic field X-axis in microtesla (µT). All options from
   [Sensor](/components/sensor).
-- **mag_y** (*Optional*): Magnetic field Y-axis in microtesla (uT). All options from
+- **mag_y** (*Optional*): Magnetic field Y-axis in microtesla (µT). All options from
   [Sensor](/components/sensor).
-- **mag_z** (*Optional*): Magnetic field Z-axis in microtesla (uT). All options from
+- **mag_z** (*Optional*): Magnetic field Z-axis in microtesla (µT). All options from
   [Sensor](/components/sensor).
 
 ### Other
@@ -184,8 +184,8 @@ i2c:
 The BNO055 performs automatic calibration during operation. For best results:
 
 1. **Gyroscope**: Keep the sensor still for a few seconds after power-on.
-2. **Magnetometer**: Move the sensor in a figure-8 pattern to calibrate.
-3. **Accelerometer**: Place the sensor in multiple orientations (e.g., all 6 faces of a cube).
+1. **Magnetometer**: Move the sensor in a figure-8 pattern to calibrate.
+1. **Accelerometer**: Place the sensor in multiple orientations (e.g., all 6 faces of a cube).
 
 The sensor fusion algorithm (NDOF mode) requires all three sensors to be calibrated for optimal
 absolute orientation output.