improvements: change event when numeric buttons are pressed

[tiller1010]

https://werkbotstudios.teamwork.com/app/tasks/39779312

Summary

change event when numeric buttons are pressed

Testing Steps

• test with bashlin
• confirm the "product-price" request is triggered when clicking the plus/minus buttons on the quantity field
• (optional) test with other sites in other areas, confirm nothing breaks with this additional event

Git Flow

• DO NOT delete "release/*" or "hotfix/*" branches after merging a PR. These are used to publish the next release, and they are deleted automatically.
• "Squash and merge" is good on "feature/*" into "develop"
• "Create a merge commit" is good on "release/*" or "hotfix/*" into "main"
• With npm repositories, the version number must be incremented manually, before merging the release.

[aletail]

This looks good!