Update validators.eu.xlf

Spelling of 'CSRF' was incorrect
minor #11491 Update validators.eu.xlf (g123456789l)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11491).

Discussion
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Update validators.eu.xlf

Spelling of 'CSRF' was incorrect

Commits
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d432395 Update validators.eu.xlf
fixed CS
partially reverted previous commit