fix(curriculum): update beta js order (#55453)

curriculum/challenges/_meta/build-a-palindrome-checker-project/meta.json

@@ -4,7 +4,7 @@
   "dashedName": "build-a-palindrome-checker-project",
   "usesMultifileEditor": true,
   "helpCategory": "JavaScript",
-  "order": 8,
+  "order": 7,
   "superBlock": "javascript-algorithms-and-data-structures-v8",
   "challengeOrder": [
     {

curriculum/challenges/_meta/learn-the-date-object-by-building-a-date-formatter/meta.json

@@ -4,7 +4,7 @@
   "usesMultifileEditor": true,
   "hasEditableBoundaries": true,
   "dashedName": "learn-the-date-object-by-building-a-date-formatter",
-  "order": 7,
+  "order": 8,
   "superBlock": "javascript-algorithms-and-data-structures-v8",
   "challengeOrder": [
     {