update solve problem to Add Two Promises

Author: nutkiattisak

2723. Add Two Promises/index.js

@@ -0,0 +1,9 @@
+const addTwoPromises = async (promise1, promise2) => {
+  return new Promise((resolve) => {
+    promise1.then((value) => {
+      promise2.then((value2) => {
+        resolve(value + value2)
+      })
+    })
+  })
+}

README.md

@@ -15,7 +15,7 @@
 | Return Length of Arguments Passed            |    ✅     |
 | Allow One Function Call                      |    ✅     |
 | Memoize                                      |           |
-| Add Two Promises                             |           |
+| Add Two Promises                             |    ✅     |
 | Sleep                                        |    ✅     |
 | Timeout Cancellation                         |           |
 | Interval Cancellation                        |           |