Upgrade Gradle action in workflows

[IanTapply22]

Description

Replaces the outdated action gradle/gradle-build-action@v3 with gradle/actions/setup-gradle@v3

Fixes #3

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

According to the documentation on the Gradle action and the warning generated: https://github.com/gradle/actions/blob/main/docs/deprecation-upgrade-guide.md#the-action-gradlegradle-build-action-has-been-replaced-by-gradleactionssetup-gradle

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation, if any
• My changes generate no new warnings
• I have performed tests that prove my fix is effective or that my feature works, if necessary
• New and existing unit tests pass locally with my changes