Modify regex to demonstrate two field replacement

[puhley]

Changes in this pull request

Minor change to the regex example to demonstrate that the tool will replace all occurrences of C2PA_ATTACK found in the file.

Checklist

• This PR represents a single feature, fix, or change.
• All applicable changes have been documented.
• Any TO DO items (or similar) have been entered as GitHub issues and the link to that issue has been included in a comment.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f27e48e) 68.33% compared to head (219bf44) 68.33%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #110   +/-   ##
=======================================
  Coverage   68.33%   68.33%           
=======================================
  Files           2        2           
  Lines         499      499           
=======================================
  Hits          341      341           
  Misses        158      158           

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