fix: fix html extension regex

[sharanyavinod]

Description

The extension is retrieved by splitting the path by "." and would no longer be present in the value compared against regex

Related Issue

fixes #64

Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Merging #67 (e8eec9f) into master (052be87) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #67   +/-   ##
=======================================
  Coverage   92.16%   92.16%           
=======================================
  Files          11       11           
  Lines         791      791           
  Branches      206      206           
=======================================
  Hits          729      729           
  Misses         62       62           

Impacted Files	Coverage Δ
src/PathUtils.ts	96.58% <100.00%> (ø)

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[github-actions[bot]]

:tada: This PR is included in version 1.3.12 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: