Fix broken course url

src/components/SQLCourse/AccountButton.tsx

@@ -58,7 +58,7 @@ export function AccountButton() {
 
   return (
     <a
-      href={`${import.meta.env.PUBLIC_COURSE_APP_URL}/sql`}
+      href={`${import.meta.env.PUBLIC_COURSE_APP_URL}/master-sql`}
       className={`${buttonClasses} animate-fade-in`}
     >
       Start Learning

src/components/SQLCourse/BuyButton.tsx

@@ -101,7 +101,7 @@ export function BuyButton(props: BuyButtonProps) {
 
     const hasEnrolled = !!courseProgress?.enrolledAt;
     if (hasEnrolled) {
-      window.location.href = `${import.meta.env.PUBLIC_COURSE_APP_URL}/sql`;
+      window.location.href = `${import.meta.env.PUBLIC_COURSE_APP_URL}/master-sql`;
       return;
     }