chore(docs): configure prism to style diff blocks

docsite/docusaurus.config.ts

@@ -2,12 +2,12 @@
 import type {Config} from '@docusaurus/types';
 import type * as Preset from '@docusaurus/preset-classic';
 
 const organizationName = "microsoft";
 const projectName = "react-native-macos";
 const projectFriendlyName = "React Native macOS";
 const githubUrl = "https://github.com/" + organizationName + "/" + projectName;
 const mainBranchUrl = githubUrl + "/tree/main";
 const docsiteUrl = mainBranchUrl + "/docsite";
 
 const config: Config = {
   title: 'React Native macOS',
@@ -15,9 +15,9 @@
   favicon: 'img/favicon.ico',
 
   url: 'https://' + organizationName + '.github.io',
   baseUrl: "/" + projectName + "/",
 
   organizationName,  
   projectName,
 
   onBrokenLinks: 'throw',
@@ -108,6 +108,7 @@
     prism: {
       theme: prismThemes.vsLight,
       darkTheme: prismThemes.vsDark,
+      additionalLanguages: ['diff'],
     },
   } satisfies Preset.ThemeConfig,
 };