chore(deps): bump Microsoft.AspNetCore.OpenApi from 7.0.12 to 7.0.15 (#257)

Bumps [Microsoft.AspNetCore.OpenApi](https://github.com/dotnet/aspnetcore) from 7.0.12 to 7.0.15.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](https://github.com/dotnet/aspnetcore/compare/v7.0.12...v7.0.15)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.OpenApi
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gaseous-server/gaseous-server.csproj

@@ -25,7 +25,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="7.0.15" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning" Version="5.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer" Version="5.1.0" />
-    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.12" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.15" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
     <PackageReference Include="sharpcompress" Version="0.35.0" />
     <PackageReference Include="Squid-Box.SevenZipSharp" Version="1.6.1.23" />