Update pymath/power_of_i/README.md

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

Author: BrianLusina

pymath/power_of_i/README.md

@@ -2,5 +2,5 @@
 
 i is the imaginary unit, defined by i² = −1; thus it is a solution to x² + 1 = 0.
 
-Your Task Complete the function pofi that returns iii to the power of a given non-negative integer in its simplest form,
+Your Task Complete the function pofi that returns i to the power of a given non-negative integer in its simplest form,
 as a string (answer may contain i).