build(deps): bump ReactiveMarbles.RoslynHelpers from 1.1.17 to 1.2.1 (#143)

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

Author: dependabot[bot]

src/Splat.DependencyInjection.SourceGenerator/Splat.DependencyInjection.SourceGenerator.csproj

@@ -15,7 +15,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.3" PrivateAssets="all" GeneratePathProperty="true" />
     <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="3.11.0" PrivateAssets="all" GeneratePathProperty="true" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.11.0" PrivateAssets="all" GeneratePathProperty="true" />
-    <PackageReference Include="ReactiveMarbles.RoslynHelpers" Version="1.1.17" GeneratePathProperty="true" PrivateAssets="all" />
+    <PackageReference Include="ReactiveMarbles.RoslynHelpers" Version="1.2.1" GeneratePathProperty="true" PrivateAssets="all" />
     <PackageReference Include="ILRepack" Version="2.0.18" GeneratePathProperty="true" PrivateAssets="all" />
   </ItemGroup>