chore(l10n): update Norwegian Nynorsk translations

Currently translated at 6.8% (3 of 44 strings)

Translation: Fossify/File-Manager
Translate-URL: https://hosted.weblate.org/projects/fossify/file-manager/nn/
Via: Weblate

Author: Sandyran

app/src/main/res/values-nn/strings.xml

@@ -1,2 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<resources></resources>
+<resources>
+    <string name="app_launcher_name">Filbehandlar</string>
+    <string name="open_as">Opne som</string>
+    <string name="text_file">Tekstfil</string>
+</resources>