content: fix parse links with uppercase characters

ignore case sensitivity when checking for possible links

src/utils/dom.ts

@@ -104,11 +104,12 @@ export const parseTextContent = (
             return elem('a', {href: `/${npub}`, data: {profile: data}}, data.slice(6, 15))
           }
         }
-        if (!word.match(/^(https?:\/\/|www\.)\S*/)) {
+        const WORD = word.toUpperCase();
+        if (!WORD.match(/^(HTTPS?:\/\/|WWW\.)\S*/)) {
           return word;
         }
         try {
-          if (!word.startsWith('http')) {
+          if (!WORD.startsWith('HTTP')) {
             word = 'https://' + word;
           }
           const url = new URL(word);