Add translation for "more info" on join page

www/i18n/en.json

@@ -372,6 +372,7 @@
     "paste-code": "Paste code",
     "scan-hint": "Scan the barcode with your phone camera",
     "paste-hint": "Or, paste the code as text",
+    "more-info": "More Info",
     "about-app-title": "About {{appName}}",
     "about-app-para-1": "The National Renewable Energy Laboratory’s Open Platform for Agile Trip Heuristics (NREL OpenPATH) enables people to track their travel modes—car, bus, bike, walking, etc.—and measure their associated energy use and carbon footprint.",
     "about-app-para-2": "The app empowers communities to understand their travel mode choices and patterns, experiment with options to make them more sustainable, and evaluate the results. Such results can inform effective transportation policy and planning and be used to build more sustainable and accessible cities.",

www/js/onboarding/WelcomePage.tsx

@@ -100,7 +100,7 @@ const WelcomePage = () => {
       <Surface style={[onboardingStyles.page, { paddingVertical: 0 }]}>
         <View style={s.headerArea(windowWidth, colors)} aria-hidden={true} />
         <IconButton
-          accessibilityLabel="More info"
+          accessibilityLabel={t('join.more-info')}
           icon="information-variant"
           containerColor={colors.onPrimary}
           iconColor={colors.primary}