Add a note on thermal_align to fix extrisnics

examples/ImageAlign/thermal_align.py

@@ -1,5 +1,15 @@
 #!/usr/bin/env python3
 
+"""
+Due to an issue with our calibration, you might receive the following error when running this script on early release OAK Thermal devices:
+```bash
+[ImageAlign(4)] [error] Failed to get calibration data: Extrinsic connection between the requested cameraId's doesn't exist. Please recalibrate or modify your calibration data
+```
+If this happens, please download the calibration data + script from https://drive.google.com/drive/folders/1Q_MZMqWMKDC1eOqVHGPeDO-NJgFmnY5U,
+place them into the same folder, connect the camera to the computer and run the script. This will update the
+calibration and add required extrinsics between the camera sensors.
+"""
+
 import cv2
 import depthai as dai
 import numpy as np