Make 'Switch accounts' string translatable

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

app/soapbox/components/sidebar_menu.tsx

@@ -161,7 +161,9 @@ const SidebarMenu: React.FC = (): JSX.Element | null => {
                 <Stack>
                   <button type='button' onClick={handleSwitcherClick} className='py-1'>
                     <HStack alignItems='center' justifyContent='between'>
-                      <Text tag='span' size='sm' weight='medium'>Switch accounts</Text>
+                      <Text tag='span' size='sm' weight='medium'>
+                        <FormattedMessage id='profile_dropdown.switch_account' defaultMessage='Switch accounts' />
+                      </Text>
 
                       <Icon
                         src={require('@tabler/icons/icons/chevron-down.svg')}

app/soapbox/locales/pl.json

@@ -846,6 +846,7 @@
   "privacy.unlisted.short": "Niewidoczny",
   "profile_dropdown.add_account": "Dodaj istniejące konto",
   "profile_dropdown.logout": "Wyloguj @{acct}",
+  "profile_dropdown.switch_account": "Przełącz konta",
   "profile_dropdown.theme": "Motyw",
   "profile_fields_panel.title": "Pola profilu",
   "public.column_settings.title": "Ustawienia osi czasu Fediwersum",