fix(l10n): Update translations from Transifex

Signed-off-by: Nextcloud bot <[email protected]>

Author: nextcloud-bot

lib/src/main/res/values-nl/strings.xml

@@ -7,6 +7,7 @@
     -->
     <string name="close">Sluit</string>
 
+    <string name="network_error_title">Netwerkfout</string>
     <string name="retry_action">Opnieuw</string>
 
     <string name="unknown_error_title">Onbekende fout</string>