Bump Microsoft.Extensions.Configuration from 6.0.1 to 7.0.0 (#122)

Bumps [Microsoft.Extensions.Configuration](https://github.com/dotnet/runtime) from 6.0.1 to 7.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v6.0.1...v7.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Configuration
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

dotnet-core-webapp.webtests/dotnetcore-webapp.webtests.csproj

@@ -11,7 +11,7 @@
   </PropertyGroup>
 
 <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Configuration" Version="6.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.4" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0" />