fix(ci): run release workflow only on main repository by Rotzbua · Pull Request #1441 · python-zeroconf/python-zeroconf

@@            Coverage Diff             @@
##           master    #1441      +/-   ##
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- Coverage   99.78%   99.50%   -0.28%     
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  Files          30       30              
  Lines        3252     3252              
  Branches      540      540              
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- Hits         3245     3236       -9     
- Misses          5        9       +4     
- Partials        2        7       +5