fix(curriculum): use correct assert method (#61978)

curriculum/challenges/english/blocks/back-end-development-and-apis-projects/5a8b073d06fa14fcfde687aa.md

@@ -551,7 +551,7 @@ async () => {
         const { log } = await logRes.json();
         const exercise = log[0];
         assert.isString(exercise.date);
-        assert.include(expectedDates, exercise.date); // Check if date matches any valid dates
+        assert.oneOf(exercise.date, expectedDates); // Check if date matches any valid dates
       } else {
         throw new Error(`${logRes.status} ${logRes.statusText}`);
       }