Javascript: Add hint to Match Ending String Patterns (#19232)

* Javascript: Add hint to Match Ending String Patterns

Add hint to Match Ending String Patterns (https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns and https://guide.freecodecamp.org/certifications/javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns/)

* Update index.md

client/src/guide/english/certifications/javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns/index.md

@@ -1,10 +1,17 @@
+---	
+title: Match Ending String Patterns	
 ---
-title: Match Ending String Patterns
+
----
 ## Match Ending String Patterns
 
-This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/certifications/javascript-algorithms-and-data-structures/regular-expressions/match-ending-string-patterns/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
-
-<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.
-
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+
+We need to use the anchor character (```$```) to match the string ```"caboose"``` at the end of the string ```caboose```.
+
+## Solution:
+
+```js
+let caboose = "The last car on a train is the caboose";
+let lastRegex = /caboose$/; // Change this line
+let result = lastRegex.test(caboose);
+```