Update instructions.md function name to match provided template (#2259)

Author: nodakbarnes

exercises/concept/coordinate-transformation/.docs/instructions.md

@@ -33,7 +33,7 @@ Combine two transformation functions to perform a repeatable transformation. Thi
 ```javascript
 const moveCoordinatesRight2Px = translate2d(2, 0);
 const doubleCoordinates = scale2d(2, 2);
-const composedTransformations = composeTransformation(
+const composedTransformations = composeTransform(
   moveCoordinatesRight2Px,
   doubleCoordinates,
 );