Update README.md

Author: SohaibBazaz

problem-5/README.md

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+# Problem 5
+
+Link: https://leetcode.com/problems/find-the-difference/description/
+
+# Benchmarks
+
+|  | Time (mean ± σ) | Range  (min … max) | Avg.Memory | Runs |
+| --- | --- | --- | --- | --- |
+| Python | 9.7 ms ± 1.3 ms | 7.3 ms … 15.6 ms | 8420k | 304 runs |
+| Mojo | 178.0 ms ± 10.9 ms | 167.2 ms … 205.7 ms  | 8500k | 14 runs |
+
+# Which performed better?
+
+The Python code ran 18.31 ± 2.70 times faster than the Mojo code