fix: incorrect condition on workflow step

[charsleysa]

publish next step is incorrectly checking if the branch is next when the job only executes on the main branch causing publish next step to never execute

[codecov[bot]]

Codecov Report

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

Project coverage is 98.02%. Comparing base (bcd7d6e) to head (0d72760).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #176 +/- ## ======================================= Coverage 98.02% 98.02% ======================================= Files 23 23 Lines 2074 2074 Branches 307 307 ======================================= Hits 2033 2033 Misses 41 41 ```

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