container build matrix should not fail fast

[briantist]

Want to know when one fails but the other succeeds.

Related:

• 115

• https://github.com/briantist/galactory/actions/runs/6462419464/job/17543982259?pr=118

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (157ce33) 62.52% compared to head (2ca74d7) 62.52%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #120 +/- ## ======================================= Coverage 62.52% 62.52% ======================================= Files 33 33 Lines 1513 1513 ======================================= Hits 946 946 Misses 567 567 ```

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