.Net: Bump SharpToken from 1.2.17 to 2.0.3 in /dotnet (#6420)

Bumps [SharpToken](https://github.com/dmitry-brazhenko/SharpToken) from
1.2.17 to 2.0.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dmitry-brazhenko/SharpToken/releases">SharpToken's
releases</a>.</em></p>
<blockquote>
<h2>Release 2.0.3</h2>
<p>Release of version 2.0.3</p>
<h2>Release 2.0.2</h2>
<p>Release of version 2.0.2</p>
<h2>Release 2.0.1</h2>
<p>Release of version 2.0.1</p>
<h2>Release 1.2.33</h2>
<p>Release of version 1.2.33</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dmitry-brazhenko/SharpToken/commit/27eef742966ec0ce75f82277fccda3e77061f4ce"><code>27eef74</code></a>
[duplicate] Support for o200k_base and gpt-4o (omni) model (<a
href="https://github.com/dmitry-brazhenko/SharpToken/issues/43">#43</a>)</li>
<li><a
href="https://github.com/dmitry-brazhenko/SharpToken/commit/c7de8c04ba38167cdbdc23a8fac4ee521c8ee97a"><code>c7de8c0</code></a>
Add pointer to Microsoft.ML.Tokenizers (<a
href="https://github.com/dmitry-brazhenko/SharpToken/issues/37">#37</a>)</li>
<li><a
href="https://github.com/dmitry-brazhenko/SharpToken/commit/086544dcccfd36562a6eac2d5d1f603db9255925"><code>086544d</code></a>
Pr 33 (Feature/performance: This PR introduces a high number of
performance i...</li>
<li><a
href="https://github.com/dmitry-brazhenko/SharpToken/commit/e96811a19d678e8a2c1d8e8ce3704de2416e3e28"><code>e96811a</code></a>
Pipeline fix (<a
href="https://github.com/dmitry-brazhenko/SharpToken/issues/35">#35</a>)</li>
<li><a
href="https://github.com/dmitry-brazhenko/SharpToken/commit/5b48c72b6cdec7f489d72cb5c500643cf63f3ec0"><code>5b48c72</code></a>
Pipelines update (<a
href="https://github.com/dmitry-brazhenko/SharpToken/issues/34">#34</a>)</li>
<li>See full diff in <a
href="https://github.com/dmitry-brazhenko/SharpToken/compare/1.2.17...2.0.3">compare
view</a></li>
</ul>
</details>
<br />


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Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

dotnet/Directory.Packages.props

@@ -40,7 +40,7 @@
     <!-- Tokenizers -->
     <PackageVersion Include="Microsoft.ML.Tokenizers" Version="0.22.0-preview.24271.1" />
     <PackageVersion Include="Microsoft.DeepDev.TokenizerLib" Version="1.3.3" />
-    <PackageVersion Include="SharpToken" Version="1.2.17" />
+    <PackageVersion Include="SharpToken" Version="2.0.3" />
     <!-- Microsoft.Extensions.* -->
     <PackageVersion Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.1" />