Update src/Symfony/Component/Security/Resources/translations/security.nl.xlf

see #6668

Some more minor tweaks
merged branch Burgov/patch-3 (PR #6702)

This PR was merged into the master branch.

Commits
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6b669fb Update src/Symfony/Component/Security/Resources/translations/security.nl.xlf

Discussion
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Update src/Symfony/Component/Security/Resources/translations/security.nl.xlf

see #6668

Some more minor tweaks