Improve formatting of documentation section with bullet points

Co-authored-by: aaronpowell <434140+aaronpowell@users.noreply.github.com>

Author: Copilot

CONTRIBUTING.md

@@ -31,7 +31,8 @@ The Aspire Community Toolkit also has a list of issues that are labeled as [help
 
 The documentation for the Aspire Community Toolkit is available on the [Microsoft Docs](https://learn.microsoft.com/dotnet/aspire/community-toolkit/). 
 
-If you want to create new documentation or improve existing documentation, please raise an issue on the [aspire.dev repository](https://github.com/microsoft/aspire.dev). If you find any issues with the documentation, you can also contribute by submitting a PR to [the documentation repository](https://github.com/dotnet/docs-aspire).
+-   If you want to create new documentation or improve existing documentation, please raise an issue on the [aspire.dev repository](https://github.com/microsoft/aspire.dev).
+-   If you find any issues with the documentation, you can also contribute by submitting a PR to [the documentation repository](https://github.com/dotnet/docs-aspire).
 
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