Bump Microsoft.SourceLink.GitHub from 10.0.203 to 10.0.300 (#51)

Updated [Microsoft.SourceLink.GitHub](https://github.com/dotnet/dotnet)
from 10.0.203 to 10.0.300.

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

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

## 10.0.300

You can build .NET 10.0 from the repository by cloning the release tag
`v10.0.300` and following the build instructions in the [main
README.md](https://github.com/dotnet/dotnet/blob/v10.0.300/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/v10.0.300/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

## 10.0.204

You can build .NET 10.0 from the repository by cloning the release tag
`v10.0.204` and following the build instructions in the [main
README.md](https://github.com/dotnet/dotnet/blob/v10.0.204/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/v10.0.204/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@v10.0.203...v10.0.300).
</details>

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

Author: dependabot[bot]

Directory.Packages.props

@@ -18,7 +18,7 @@
   -->
   <ItemGroup>
     <PackageVersion Include="IntelliTect.Multitool" Version="2.1.0" />
-    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.203" />
+    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.300" />
     <PackageVersion Include="Moq" Version="4.20.70" />
     <PackageVersion Include="Moq.AutoMock" Version="3.5.0" />
     <PackageVersion Include="TUnit" Version="1.45.0" />