Fix accidental typo

Author: schwabe

main/src/ui/res/xml/general_settings.xml

@@ -26,7 +26,7 @@
                 android:disableDependentsState="true"
                 android:key="ovpn3"
                 android:summaryOff="Use OpenVPN 2.x"
-                android:summaryOn="Use the C++ O4penVPN library (experimental)"
+                android:summaryOn="Use the C++ OpenVPN library (experimental)"
                 android:title="OpenVPN 3 Core" />