Use at method to access last array elements

[jkoenig134]

Readiness checklist

• I added/updated tests.
• I ensured that the PR title is good enough for the changelog.
• I labeled the PR.
• I self-reviewed the PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
...modules/runtimeEvents/RelationshipChangedModule.ts	97.91% <100.00%> (ø)
...ion/src/modules/attributes/AttributesController.ts	90.95% <100.00%> (ø)

... and 213 files with indirect coverage changes