fix incompatibility with ov5640 and Pico

Changes to Adafruit_CircuitPython_OV5640 doubled the memory usage for a given quality setting.  This makes the latest release of in CircuitPython incompatible with the previous quality setting=3
 + colorspace=adafruit_ov5640.OV5640_COLOR_JPEG due to that working out an an allocation size of 204800.  This is too much for the first Pico.
Here is the breaking change:
adafruit/Adafruit_CircuitPython_OV5640#35
Quality 4 is still too large at 153,600 bytes.
Quality 5 using 122,880 works.

Author: casten

PiCowbell_Camera_Demos/JPEG_Capture/code.py

@@ -76,7 +76,7 @@ def open_next_image():
         return open(filename, "wb")
 
 cam.colorspace = adafruit_ov5640.OV5640_COLOR_JPEG
-cam.quality = 3
+cam.quality = 5
 b = bytearray(cam.capture_buffer_size)
 jpeg = cam.capture(b)