Add task to update changlog file

[kmcginnes]

Updates the PR template to add a task to update the changelog file.

Check List

• I confirm that my contribution is made under the terms of the Apache 2.0 license.
• I have run pnpm checks to ensure code compiles and meets standards.
• I have run pnpm test to check if all tests are passing.
• I have covered new added functionality with unit tests if necessary.
• I have added an entry in the Changelog.md.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 14.88%. Comparing base (361c4ba) to head (5ee9440).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #362      +/-   ##
==========================================
+ Coverage   13.97%   14.88%   +0.90%     
==========================================
  Files         414      415       +1     
  Lines       30639    30886     +247     
  Branches      878      948      +70     
==========================================
+ Hits         4283     4596     +313     
+ Misses      26026    25962      -64     
+ Partials      330      328       -2     

Flag	Coverage Δ
unittests	14.88% <ø> (+0.90%)	⬆️

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