Bump Microsoft.SourceLink.GitHub from 10.0.202 to 10.0.203 (#195)

Updated [Microsoft.SourceLink.GitHub](https://github.com/dotnet/dotnet)
from 10.0.202 to 10.0.203.

<details>
<summary>Release notes</summary>

_Sourced from [Microsoft.SourceLink.GitHub's
releases](https://github.com/dotnet/dotnet/releases)._

## 10.0.203

You can build .NET 10.0 from the repository by cloning the release tag
`v10.0.203` and following the build instructions in the [main
README.md](https://github.com/dotnet/dotnet/blob/v10.0.203/README.md#building).

Alternatively, you can build from the sources attached to this release
directly.
More information on this process can be found in the [dotnet/dotnet
repository](https://github.com/dotnet/dotnet/blob/v10.0.203/README.md#building-from-released-sources).

Attached are PGP signatures for the GitHub generated tarball and
zipball. You can find the public key at https://dot.net/release-key-2023

Commits viewable in [compare
view](dotnet/dotnet@v10.0.202...v10.0.203).
</details>

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

Author: dependabot[bot]

Directory.Packages.props

@@ -8,7 +8,7 @@
     <PackageVersion Include="Microsoft.Build.Locator" Version="1.11.2" />
     <PackageVersion Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="10.0.203" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
-    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.202" />
+    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.203" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="xunit" Version="2.9.3" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />