Update 08-strings.md

Sujansinhthakor · web-flow · commit 0ceeb9bf17e2 · 2021-12-04T13:31:37.000+05:30
diff --git a/assignments/08-strings.md b/assignments/08-strings.md
@@ -28,6 +28,7 @@
 - [Reverse Prefix of Word](https://leetcode.com/problems/reverse-prefix-of-word/)
 - [Roman to Integer](https://leetcode.com/problems/roman-to-integer/)
 - [Valid Parentheses](https://leetcode.com/problems/valid-parentheses/)
+- [Length of last word](https://leetcode.com/problems/length-of-last-word/)
 
 ## Medium
 
