Update NL for 1.4.2 (#3685)

app/javascript/mastodon/locales/nl.json

@@ -27,8 +27,8 @@
   "column.notifications": "Meldingen",
   "column.public": "Globale tijdlijn",
   "column_back_button.label": "terug",
-  "column_header.pin": "Pin",
-  "column_header.unpin": "Unpin",
+  "column_header.pin": "Vastmaken",
+  "column_header.unpin": "Losmaken",
   "column_subheading.navigation": "Navigatie",
   "column_subheading.settings": "Instellingen",
   "compose_form.lock_disclaimer": "Jouw account is niet {locked}. Iedereen kan jou volgen en toots zien die je alleen aan volgers hebt gericht.",