.Net: minor readme edits - my first PR to SK (#11120)

### Motivation and Context

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  1. Why is this change required? Slight editorial corrections
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3. What scenario does it contribute to? Model Context Protocol Sample
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### Description

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Very slight edits to MCP Sample Demo readme.md

### Contribution Checklist

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- [X ] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
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raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄

Author: Jenp

Diff for: dotnet/samples/Demos/ModelContextProtocol/README.md

@@ -4,9 +4,9 @@ This example demonstrates how to use Model Context Protocol tools with Semantic
 
 MCP is an open protocol that standardizes how applications provide context to LLMs.
 
-For for information on Model Context Protocol (MCP) please refer to the [documentation](https://modelcontextprotocol.io/introduction).
+For information on Model Context Protocol (MCP) please refer to the [documentation](https://modelcontextprotocol.io/introduction).
 
-This sample uses [mcpdotnet](https://www.nuget.org/packages/mcpdotnet) is heavily influenced by the [samples](https://github.com/PederHP/mcpdotnet/tree/main/samples) from that repository.
+This sample uses [mcpdotnet](https://www.nuget.org/packages/mcpdotnet) and is heavily influenced by the [samples](https://github.com/PederHP/mcpdotnet/tree/main/samples) from that repository.
 
 The sample shows: