fix(front): Fixed regex order in embed

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2642>

changes/changelog.d/embed-regex.bugfix

@@ -0,0 +1 @@
+Fixed issue with regular expression in embed.

front/public/embed.html

@@ -82,7 +82,8 @@
       //       that do not support other codecs to be able to play it :)
       if (sources.length > 0 && !sources.some(({ mimetype }) => mimetype === 'audio/mpeg')) {
         const source = sources[0].listen_url
-        const url = new URL(source.test(/^https?:/)
+        const regex = /^https?:/
+        const url = new URL(regex.test(source)
           ? source
           : source[0] === '/'
             ? `${baseUrl}${source}`