Added matrix_exponentiation under matrix in README

Author: c-utkarsh

README.md

@@ -209,7 +209,6 @@ If you want to uninstall algorithms, it is as simple as:
     - [gcd/lcm](algorithms/maths/gcd.py)
     - [generate_strobogrammtic](algorithms/maths/generate_strobogrammtic.py)
     - [is_strobogrammatic](algorithms/maths/is_strobogrammatic.py)
-    - [matrix_exponentiation](algorithms/matrix/matrix_exponentiation.py)
     - [modular_exponential](algorithms/maths/modular_exponential.py)
     - [next_bigger](algorithms/maths/next_bigger.py)
     - [next_perfect_square](algorithms/maths/next_perfect_square.py)
@@ -231,6 +230,7 @@ If you want to uninstall algorithms, it is as simple as:
     - [bomb_enemy](algorithms/matrix/bomb_enemy.py)
     - [copy_transform](algorithms/matrix/copy_transform.py)
     - [count_paths](algorithms/matrix/count_paths.py)
+    - [matrix_exponentiation](algorithms/matrix/matrix_exponentiation.py)
     - [matrix_rotation.txt](algorithms/matrix/matrix_rotation.txt)
     - [matrix_inversion](algorithms/matrix/matrix_inversion.py)
     - [matrix_multiplication](algorithms/matrix/multiply.py)