build: update gradle wrapper version

[camargo]

Description

• Use Gradle 7.6 snapshot so we can use Java 19 to build Aerie locally
• Follow up to Update to Java 19 #379
• See: Support Java 19 gradle/gradle#20372
• See: https://services.gradle.org/distributions-snapshots/
• See: https://services.gradle.org/distributions/ (Will return to pulling from here when Gradle 7.6 is released)

Future

When Gradle 7.6 is officially released we can switch to use it here

[github-actions]

Automatically approved due to detection of the following labels: hotfix

[Twisol]

I didn't need to do this on my computer -- I'm still using 7.5.

Did you set your JAVA_HOME so that Gradle would use Java 18 or earlier? It's no different to IntelliJ running on Java 11 (admittedly its own bundled Java 11). Different programs need different versions.

[camargo]

@Twisol No I set my JAVA_HOME to use Java 19

[Twisol]

That would be why. You can keep using stable Gradle if you set your JAVA_HOME to Java 18.

[camargo]

@Twisol Yes I realize. This is just for version consistency.