fix: stamptype value from st to 01

[aferracci]

List of Changes

• Fixed STAMP_TYPE value from st to 01

Motivation and Context

This change si necessary to get the response compliant to the xsd schema

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

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