fix: update expected images for redact samples test

[jkwlui]

Fixes: #77

• Tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[codecov]

Codecov Report

Merging #78 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #78   +/-   ##
=====================================
  Coverage     100%   100%           
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  Files           1      1           
  Lines           4      4           
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  Hits            4      4

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[ace-n]

This is probably the quickest fix.

It has been an issue in the past, however - so a more permanent fix would be to scan the resulting image for an appropriate sub-image (at a fixed position). We might be able to use sharp for that.

[jkwlui]

Thanks @ace-n! I opened an issue regarding the potential fix.