Update README.md

Author: mcasperson

README.md

@@ -152,8 +152,8 @@ export default HelloWorldTargetUI;
 Form validation is performed by the function exported by the `validate.ts` file. This function returns an array of `ValueValidator` objects, and takes two parameters:
 1. The step inputs as [input paths](https://github.com/OctopusDeploy/Architecture/blob/main/Steps/Concepts/InputsAndOutputs.md#input-paths).
 2. A validation function that returns a `ValueValidator` and takes two parameters:
-  1. An input path.
-  2. A function returning a string containing the error code (or returns nothing if there is no validation error) and takes the input value (retrieved from the input path) as the first parameter.
+   1. An input path.
+   2. A function returning a string containing the error code (or returns nothing if there is no validation error) and takes the input value (retrieved from the input path) as the first parameter.
 
 Here is an example: