devel/gradle: Update to version 9.3.1

Release notes:
https://docs.gradle.org/9.3.1/release-notes.html
https://docs.gradle.org/9.3.0/release-notes.html
https://docs.gradle.org/9.2.1/release-notes.html
https://docs.gradle.org/9.2.0/release-notes.html
https://docs.gradle.org/9.1.0/release-notes.html

Approved by: eduardo (mentor, implicit)
MFH: 2026Q1