CompatHelper: bump compat for Images to 0.26, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Images package from 0.25.2 to 0.25.2, 0.26.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov-commenter]

Codecov Report

Merging #90 (425747d) into main (21b8561) will not change coverage.
The diff coverage is n/a.

❗ Current head 425747d differs from pull request most recent head b61b9d6. Consider uploading reports for the commit b61b9d6 to get more accurate results

@@           Coverage Diff           @@
##             main      #90   +/-   ##
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  Coverage   95.65%   95.65%           
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  Files          14       14           
  Lines         345      345           
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  Hits          330      330           
  Misses         15       15