Relax ruby dependency in gemspec file

[etagwerker]

• [x] Add an entry to CHANGELOG.md that links to this PR under the "main (unreleased)" heading.

This PR relaxes the Ruby dependency configuration.

I will abide by the code of conduct.

[codecov[bot]]

Codecov Report

Merging #92 (441f837) into main (507a725) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 441f837 differs from pull request most recent head 1d72255. Consider uploading reports for the commit 1d72255 to get more accurate results

@@           Coverage Diff           @@
##             main      #92   +/-   ##
=======================================
  Coverage   98.26%   98.26%           
=======================================
  Files          25       25           
  Lines         462      462           
=======================================
  Hits          454      454           
  Misses          8        8           

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