Update DefaultAuthenticationSuccessHandler.php
minor #10436 Update DefaultAuthenticationSuccessHandler.php (ureimers)

This PR was submitted for the 2.3-dev branch but it was merged into the 2.3 branch instead (closes #10436).

Discussion
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Update DefaultAuthenticationSuccessHandler.php

[Security] [Http] [Authentication] Fixed class description of DefaultAuthenticatioNSuccessHander

| Q             | A
| ------------- | ---
| Fixed tickets | none
| License       | MIT

Commits
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b458551 Update DefaultAuthenticationSuccessHandler.php