#1168 Add repo link to nuget package

[thompson-tomo]

Types of Changes

Prerequisites

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• I have read the CONTRIBUTING document
• My code follows the code style of this project

Contribution Type

What types of changes does your code introduce? Put an x in all the boxes that apply:

• New feature (non-breaking change which adds functionality, make sure to open an associated issue first)
• All new and existing tests passed

Description

This change sets the repository url for the nuget package which will be shown on Nuget.org and can be used for analysis by third party tools.

Closes #1168

[CLAassistant]

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