Update kotlin to 1.6.10

What does this MR do?

The version of kotlin was bumped to 1.5.10 as part of Fix Gradle 7 compatibility issue (!13 - merged), however, that MR caused the gemnasium-maven-dependency_scanning job to fail with the following error:

> Task :gemnasiumDumpDependencies FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':gemnasiumDumpDependencies'.
> Project has 2 unresolved dependencies: org.jetbrains.kotlin:kotlin-test:1.5.10, org.jetbrains.kotlin:kotlin-test:1.5.10

This MR fixes the unresolved dependency error by updating to kotlin 1.6.10

Testing

The gemnasium-maven-dependency_scanning job now succeeds as expected.