Make picamera2 prerequisite introduction sequence consistent

Author: nathan-contino

documentation/asciidoc/accessories/ai-camera/getting-started.adoc

@@ -113,7 +113,7 @@ For example, `max_detections` defines the maximum number of bodies that the pipe
 
 For examples of image classification, object detection, object segmentation, and pose estimation using Picamera2, see https://github.com/raspberrypi/picamera2/blob/main/examples/imx500/[the `picamera2` GitHub repository].
 
-Most of the examples use OpenCV for some additional processing, so if you haven't done so previously, please run:
+Most of the examples use OpenCV for some additional processing. To install the dependencies required to run OpenCV, run the following command:
 
 [source,console]
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