Translations update from Weblate (#32)

* Translated using Weblate (Norwegian Bokmål)

Currently translated at 90.5% (115 of 127 strings)

Translation: pineapple-pictures/Application
Translate-URL: https://hosted.weblate.org/projects/pineapple-pictures/application/nb_NO/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (127 of 127 strings)

Translation: pineapple-pictures/Application
Translate-URL: https://hosted.weblate.org/projects/pineapple-pictures/application/nl/

* Translated using Weblate (Sinhala)

Currently translated at 46.4% (59 of 127 strings)

Translation: pineapple-pictures/Application
Translate-URL: https://hosted.weblate.org/projects/pineapple-pictures/application/si/

Co-authored-by: Allan Nordhøy <epost@anotheragency.no>
Co-authored-by: Heimen Stoffels <vistausss@fastmail.com>
Co-authored-by: HelaBasa <R45XvezA@protonmail.ch>

app/translations/PineapplePictures_si.ts

@@ -152,12 +152,12 @@
     <message>
         <location filename="../aboutdialog.cpp" line="139"/>
         <source>&amp;Help</source>
-        <translation>&amp;උපකාර</translation>
+        <translation>උපකාර</translation>
     </message>
     <message>
         <location filename="../aboutdialog.cpp" line="140"/>
         <source>&amp;About</source>
-        <translation>&amp;පිළිබඳව</translation>
+        <translation>පිළිබඳව</translation>
     </message>
     <message>
         <location filename="../aboutdialog.cpp" line="142"/>