Bump System.Net.Http.Json from 9.0.0 to 9.0.1 in /src

Bumps [System.Net.Http.Json](https://github.com/dotnet/runtime) from 9.0.0 to 9.0.1.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.0...v9.0.1)

---
updated-dependencies:
- dependency-name: System.Net.Http.Json
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/AddBook/AddBook.csproj

@@ -11,7 +11,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Octokit" Version="14.0.0" />
-    <PackageReference Include="System.Net.Http.Json" Version="9.0.0" />
+    <PackageReference Include="System.Net.Http.Json" Version="9.0.1" />
     <PackageReference Include="YamlDotNet" Version="16.3.0" />
   </ItemGroup>