Bump NuGet.Protocol and NuGet.Resolver

Bumps NuGet.Protocol from 7.0.1 to 7.3.1
Bumps NuGet.Resolver from 7.0.1 to 7.3.1

---
updated-dependencies:
- dependency-name: NuGet.Protocol
  dependency-version: 7.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: NuGet.Resolver
  dependency-version: 7.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -13,8 +13,8 @@
     <!-- Roslyn Scripting -->
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="5.0.0" />
     <!-- NuGet Client Libraries -->
-    <PackageVersion Include="NuGet.Protocol" Version="7.0.1" />
-    <PackageVersion Include="NuGet.Resolver" Version="7.0.1" />
+    <PackageVersion Include="NuGet.Protocol" Version="7.3.1" />
+    <PackageVersion Include="NuGet.Resolver" Version="7.3.1" />
     <!-- Testing -->
     <PackageVersion Include="NUnit" Version="4.4.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.11.2" />