[Pre ?] Blazor startup options format

[guardrex]

Fixes #34659

🛑 HOLD ✋

... and note that this will need What's New coverage.

Holding for final approval and merge of dotnet/aspnetcore#54649 with a confirmation of the preview release.

---

Internal previews

📄 File	🔗 Preview link
aspnetcore/blazor/fundamentals/environments.md	aspnetcore/blazor/fundamentals/environments
aspnetcore/blazor/fundamentals/logging.md	aspnetcore/blazor/fundamentals/logging
aspnetcore/blazor/fundamentals/signalr.md	aspnetcore/blazor/fundamentals/signalr
aspnetcore/blazor/fundamentals/startup.md	aspnetcore/blazor/fundamentals/startup
aspnetcore/blazor/globalization-localization.md	aspnetcore/blazor/globalization-localization
aspnetcore/blazor/host-and-deploy/webassembly/index.md	aspnetcore/blazor/host-and-deploy/webassembly/index

[guardrex]

@Rick-Anderson @wadepickett ... Nevermind! There is something wrong with the file after all. Somehow, my backticks were stripped off of my code languages in two code blocks. I'll fix it up.

UPDATE: I see what happened here. I placed the content into a GH issue comment. To have the code appear alongside the text, I removed the backticks for the issue comment. When I went to place the content+code back into the article, I didn't add the backticks after pasting. 🙈

I'm not off to a great start here! Let's hope the day goes better! 😆