Bump ApprovalTests from 5.5.0 to 5.7.0 (#245)

Bumps [ApprovalTests](https://github.com/approvals/ApprovalTests.Net) from 5.5.0 to 5.7.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Net/releases)
- [Commits](approvals/ApprovalTests.Net@5.5.0...5.7.0)

---
updated-dependencies:
- dependency-name: ApprovalTests
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

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

src/Hyperion.API.Tests/Hyperion.API.Tests.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ApprovalTests" Version="5.5.0" />
+    <PackageReference Include="ApprovalTests" Version="5.7.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="$(TestSdkVersion)" />
     <PackageReference Include="PublicApiGenerator" Version="10.2.0" />
     <PackageReference Include="xunit" Version="$(XunitVersion)" />