[HttpFoundation] Minor spelling fix in PHPDocs
minor #12374 [HttpFoundation] Minor spelling fix in PHPDocs (GeertDD)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #12374).

Discussion
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[HttpFoundation] Minor spelling fix in PHPDocs

| Q             | A
| ------------- | ---
| Fixed tickets |
| License       | MIT

Commits
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35791fd [HttpFoundation] Minor spelling fix in PHPDocs