refactor: migrate prism from unpkg to jsdelivr cdn

Author: andreruffert

src/utils.js

@@ -1,3 +1,5 @@
+const PRISM_CDN_URL = 'https://cdn.jsdelivr.net/npm/prismjs@1.30.0';
+
 /**
  * Create & register the token `Highlight`'s in the `CSS.highlights` registry.
  * This enables the use of `::highlight(tokenType)` in CSS to style them.
@@ -146,7 +148,7 @@ export async function loadPrismLanguage(language) {
     await new Promise((resolve, reject) => {
       if (langData.has(lang)) return resolve();
       const script = document.createElement('script');
-      script.src = `https://unpkg.com/prismjs@1.29.0/components/prism-${lang}.min.js`;
+      script.src = `${PRISM_CDN_URL}/components/prism-${lang}.min.js`;
       script.onload = () => {
         document.head.removeChild(script);
         langData.add(lang);
@@ -170,7 +172,7 @@ export async function loadPrismLanguage(language) {
 export function loadPrismCore() {
   return new Promise((resolve, reject) => {
     const script = document.createElement('script');
-    script.src = 'https://unpkg.com/prismjs@1.29.0/components/prism-core.min.js';
+    script.src = `${PRISM_CDN_URL}/components/prism-core.min.js`;
     script.onload = resolve;
     script.onerror = reject;
     document.head.appendChild(script);