Use non-normative should in Javadocs

[trask]

Change normative SHOULD / SHOULD NOT wording in Javadocs to non-normative should / should not.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.88%. Comparing base (3351182) to head (d224884).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #8390   +/-   ##
=========================================
  Coverage     90.88%   90.88%           
  Complexity     7986     7986           
=========================================
  Files           898      898           
  Lines         24115    24115           
  Branches       2412     2412           
=========================================
  Hits          21916    21916           
  Misses         1456     1456           
  Partials        743      743           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[trask]

[flint-setup]
ERROR: obsolete tool key in mise.toml: "github:grafana/flint" (replaced by "aqua:grafana/flint").
ERROR: legacy Flint setup files or config need migration.
Run flint run --fix flint-setup to apply Flint setup migrations.

flint: 1 check failed (flint-setup)
💡 Try flint run --fix to auto-fix lint issues, then re-run flint run to verify.
[lint:links] ERROR task failed

cc @zeitlinger