chore(deps): update akhileshns/heroku-deploy action to v3.14.15

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
akhileshns/heroku-deploy	action	minor	v3.12.14 -> v3.14.15

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Release Notes

akhileshns/heroku-deploy (akhileshns/heroku-deploy)

v3.14.15

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• Fix stack issue (courtesy of @​sstepanchuk)
• Add dotenv dependency (courtesy of @​sstepanchuk)
• Update documentation to more precisely mention that the heroku cli must be installed

v3.13.15

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Updated node version to "node20" (as "node18" is not supported by GitHub Actions)

v3.13.14

Compare Source

Updated node version from 16 to 18 (as 16 is causing problems due to deprecation)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.50%. Comparing base (f244c68) to head (610e8e3).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #613   +/-   ##
=======================================
  Coverage   92.50%   92.50%           
=======================================
  Files           4        4           
  Lines          80       80           
  Branches       23       23           
=======================================
  Hits           74       74           
  Misses          5        5           
  Partials        1        1           

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