Bump .NET NuGet packages

Bumps .NET dependencies to their latest versions for the .NET 7.0.305 SDK.

Bumps Microsoft.AspNetCore.AzureAppServices.HostingStartup from 7.0.7 to 7.0.8.
Bumps Microsoft.AspNetCore.Mvc.Testing from 7.0.7 to 7.0.8.
Bumps Microsoft.Extensions.Http.Polly from 7.0.7 to 7.0.8.

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.AzureAppServices.HostingStartup
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.AspNetCore.Mvc.Testing
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.Extensions.Http.Polly
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: costellobot <102549341+costellobot@users.noreply.github.com>

Directory.Packages.props

@@ -10,9 +10,9 @@
     <PackageVersion Include="Humanizer" Version="2.14.1" />
     <PackageVersion Include="JustEat.HttpClientInterception" Version="4.0.0" />
     <PackageVersion Include="MartinCostello.Logging.XUnit" Version="0.3.0" />
-    <PackageVersion Include="Microsoft.AspNetCore.AzureAppServices.HostingStartup" Version="7.0.7" />
-    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="7.0.7" />
-    <PackageVersion Include="Microsoft.Extensions.Http.Polly" Version="7.0.7" />
+    <PackageVersion Include="Microsoft.AspNetCore.AzureAppServices.HostingStartup" Version="7.0.8" />
+    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="7.0.8" />
+    <PackageVersion Include="Microsoft.Extensions.Http.Polly" Version="7.0.8" />
     <PackageVersion Include="Microsoft.IdentityModel.JsonWebTokens" Version="6.31.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.6.2" />
     <PackageVersion Include="Microsoft.Playwright" Version="1.35.0" />