🐛 fix copy: newsletter -> newsletters

functions/donation/thank-you.ts

@@ -40,7 +40,7 @@ const constructMessage = (data: MessageData): string => {
         data.giftAid &&
             `If you are a UK tax payer, we can make your donations go further with Gift Aid. Through the Government’s Gift Aid scheme, we can claim an additional 25p for every £1 you donated. So if you are a UK taxpayer, you can increase the value of your donations to us by 25%, at no extra cost to yourself. Simply fill in your details in this form to confirm your taxpayer status: https://docs.google.com/forms/d/e/1FAIpQLSe7Mgm70-3UiRfh_aEJCusWCabdBFPN7hXoXMnby_6aAJsJVg/viewform?usp=pp_url&entry.2044643286=gcdl_${data.customerId}`,
         "Your generosity offers vital support in expanding our efforts to build an independent and free online publication on global development. Your donation will support the expansion of the online publication in close collaboration with our research colleagues at the University of Oxford and around the world.",
-        "Given your interest in our work, we hope you will continue to follow our progress via our newsletter – if you have not done so, we’d like to invite you to join: https://ourworldindata.org/subscribe.",
+        "Given your interest in our work, we hope you will continue to follow our progress via our newsletters – if you have not done so, we’d like to invite you to join: https://ourworldindata.org/subscribe.",
         `Reader donations are essential to our work, providing us with the stability and independence we need, so we can focus on research and the development of our site. ${
             data.showOnList
                 ? "In recognition of your support we will be delighted to include your name as part of our List of Supporters: https://ourworldindata.org/supporters. We will add your name the next time we update the list and the sum of your donation will not be disclosed."

site/gdocs/components/HomepageIntro.tsx

@@ -141,7 +141,7 @@ export function HomepageIntro({ className, featuredWork }: HomepageIntroProps) {
                     <Button
                         href="#subscribe"
                         className="homepage-intro__subscribe-button body-3-medium"
-                        text="Subscribe to our newsletter"
+                        text="Subscribe to our newsletters"
                         theme="outline-vermillion"
                         icon={null}
                     />

site/gdocs/pages/Homepage.tsx

@@ -23,7 +23,7 @@ const SocialSection = () => {
             id="subscribe"
         >
             <section className="homepage-social-ribbon span-cols-8 col-start-2 span-sm-cols-12 col-sm-start-2">
-                <h2 className="h2-semibold">Subscribe to our newsletter</h2>
+                <h2 className="h2-semibold">Subscribe to our newsletters</h2>
                 <div id="newsletter-subscription-root">
                     {/* Hydrated in runSiteTools() */}
                     <NewsletterSubscriptionForm