build: set dev status alpha

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.90%. Comparing base (0a31ce9) to head (9465bbb). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #156 +/- ## ======================================= Coverage 89.90% 89.90% ======================================= Files 26 26 Lines 1486 1486 ======================================= Hits 1336 1336 Misses 150 150 ```

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[nstarman]

Sigh. Need to set more pins for RTD.