Pontoon: Update Sinhala (si) localization of Mozilla.org

Co-authored-by: හෙළබස සමූහය (HelaBasa Group) <[email protected]>

si/products/vpn/platforms/desktop.ftl

@@ -0,0 +1,9 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+
+### URL: https://www-dev.allizom.org/products/vpn/desktop/
+
+# Desktop strings
+vpn-desktop-hero-headline = වැඩතලය සඳහා { -brand-name-mozilla-vpn } සමඟ ඔබගේ අන්තර්ජාල සම්බන්‍ධතාව ආරක්‍ෂා කරගන්න