[Security] consistent singular/plural translation in Dutch

The plural form of "Too many failed login attempts, ..." was added later and was most likely a machine translation. As this translation is inconsistent with the preexisting singular translation (and others) update it to be consistent.

Author: RobertMe

Resources/translations/security.nl.xlf

@@ -76,7 +76,7 @@
             </trans-unit>
             <trans-unit id="20">
                 <source>Too many failed login attempts, please try again in %minutes% minutes.</source>
-                <target>Te veel mislukte inlogpogingen, probeer het over %minutes% minuten opnieuw.</target>
+                <target>Te veel onjuiste inlogpogingen, probeer het opnieuw over %minutes% minuten.</target>
             </trans-unit>
         </body>
     </file>