fix: Embed - app.cal.com instead of cal.com (#11384)

* Fix yarn.lock

* Force app.cal.com because Safari and rewrites using referrer

* Add comment

packages/embeds/embed-core/src/embed.ts

@@ -278,7 +278,12 @@ export class Cal {
       }
     }
 
-    const urlInstance = new URL(`${calOrigin || config.calOrigin}/${calLink}`);
+    // cal.com has rewrite issues on Safari that sometimes cause 404 for assets.
+    const originToUse = (calOrigin || config.calOrigin || "").replace(
+      "https://cal.com",
+      "https://app.cal.com"
+    );
+    const urlInstance = new URL(`${originToUse}/${calLink}`);
     if (!urlInstance.pathname.endsWith("embed")) {
       // TODO: Make a list of patterns that are embeddable. All except that should be allowed with a warning that "The page isn't optimized for embedding"
       urlInstance.pathname = `${urlInstance.pathname}/embed`;