feat(client): Translatable donation link

Replaces the "other ways to donate" link with a
swappable translation token - allowing us to use
localised versions of the news article when
they are available.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

client/i18n/translations-schema.js

@@ -335,6 +335,7 @@ const translationsSchema = strictObject({
     'why-donate-2': stringType,
     'bigger-donation': stringType,
     'other-ways': stringType,
+    'other-ways-url': stringType,
     'failed-pay': stringType,
     'try-again': stringType,
     'card-number': stringType,