iis-website-add-release-number-to-response-header: Fix error

[Adam-S-Daniel]

Fixed the following exception

Exception calling "GetSection" with "2" argument(s): "Filename: redirection.config
Error: Cannot read configuration file

Credit for revealing the root cause (in some instances the script would load the incorrect assembly, which in turn would try to modify the incorrect configuration file):
dsccommunity/xPSDesiredStateConfiguration#191 (comment)
Credit for the solution:
dsccommunity/xPSDesiredStateConfiguration#462

Added a prefix to parameter names

Note that this may cause Octopus to prompt users who update the step in existing processes to do so manually.

Step template checklist

• Id should be a GUID that is not 00000000-0000-0000-0000-000000000000
  • NOTE If you are modifying an existing step template, please make sure that you do not modify the Id property (updating the Id will break the Library sync functionality in Octopus).
• Version should be incremented, otherwise the integration with Octopus won't update the step template correctly
• Parameter names should not start with $
• To minimize the risk of step template parameters clashing with other variables in a project that uses the step template, ensure that you prefix your parameter names (e.g. an abbreviated name for the step template or the category of the step template
• LastModifiedBy field must be present, and (optionally) updated with the correct author
• If a new Category has been created:
  • An image with the name {categoryname}.png must be present under the step-templates/logos folder
  • The switch in the humanize function in gulpfile.babel.js must have a case statement corresponding to it

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