Update decoding-prime-events.markdown

Updated the 5-9th bytes to further describe how the date is stored. This appears to be the structure based on analysis for the 722.
engrave @barbiter's data

Thanks @barbiter!
with --larger
add logs here for posterity
send set temp basal (no-op params)
again
again
again
set temp basal at 0.80
after canceling and retrying, this is correct params

The parameters:
```python
[0x00, 0x20, 0x07]
```

Causes temp basal:
  rate: 0.80U
  duration: 3.30
re-render nicer markdown
rerender again
rerender markdown
re-render again
tweak json/javascript rendering
re-render with examining rates
baseline 0x00, 0x20, 0x07
baseline 0x00, 0x21, 0x07
baseline 0x00, 0x22, 0x07
baseline 0x00, 0x23, 0x07