Update algorithms/sliding_window/permutation_in_string/README.md

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: BrianLusina

algorithms/sliding_window/permutation_in_string/README.md

@@ -22,7 +22,7 @@ Output: false
 
 ## Constraints
 
-- 1 <= s1.length, s2.length <= 104
+- 1 <= s1.length, s2.length <= 10^4
 - s1 and s2 consist of lowercase English letters.
 
 ## Topics