fix: added missing alt attributes (#743)

Author: JMarques1196

website/docusaurus.config.js

@@ -156,13 +156,13 @@ module.exports = {
             {
               // label: "Discord",
               html: `<a class="footer__link-item" href="https://discord.gg/wTGS5z9">
-              <img src="https://img.shields.io/discord/508357248330760243.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2" style="max-width:100%;">
+              <img src="https://img.shields.io/discord/508357248330760243.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2" style="max-width:100%;" alt="Discord">
               </a>`,
             },
             {
               // label: "Spread the word",
               html: `<a class="footer__link-item" href="http://twitter.com/home?status=Awesome%20%40Reactjs%20%2B%20%40TypeScript%20cheatsheet%20by%20%40ferdaber%2C%20%40sebsilbermann%2C%20%40swyx%20%26%20others!%20https%3A%2F%2Fgithub.com%2Ftypescript-cheatsheets%2Freact">
-              <img src="https://img.shields.io/twitter/url?label=Help%20spread%20the%20word%21&style=social&url=https%3A%2F%2Fgithub.com%2Ftypescript-cheatsheets%2Freact" style="max-width:100%;">
+              <img src="https://img.shields.io/twitter/url?label=Help%20spread%20the%20word%21&style=social&url=https%3A%2F%2Fgithub.com%2Ftypescript-cheatsheets%2Freact" style="max-width:100%;" alt="X">
               </a>`,
             },
           ],