Fix getOidcCallbackUrl for Element Desktop (#28521)

Got broken by a Chrome change

Signed-off-by: Michael Telatynski <[email protected]>

Author: t3chguy

src/vector/platform/ElectronPlatform.tsx

@@ -474,10 +474,8 @@ export default class ElectronPlatform extends BasePlatform {
         const url = super.getOidcCallbackUrl();
         url.protocol = "io.element.desktop";
         // Trim the double slash into a single slash to comply with https://datatracker.ietf.org/doc/html/rfc8252#section-7.1
-        // Chrome seems to have a strange issue where non-standard protocols prevent URL object mutations on pathname
-        // field, so we cannot mutate `pathname` reliably and instead have to rewrite the href manually.
-        if (url.pathname.startsWith("//")) {
-            url.href = url.href.replace(url.pathname, url.pathname.slice(1));
+        if (url.href.startsWith(`${url.protocol}://`)) {
+            url.href = url.href.replace("://", ":/");
         }
         return url;
     }