Update to ASP.NET Core 11 preview 2

[martincostello]

Update to preview 2 of ASP.NET Core 11.

[Copilot]

Pull request overview

Updates the repository to ASP.NET Core 11 preview 2 by bumping the .NET SDK/tooling and related ASP.NET Core test package versions, plus a small tweak in OpenID option initialization.

Changes:

• Bump global.json SDK + tool versions to 11.0.100-preview.2.26159.112.
• Update centralized package versions for Microsoft.AspNetCore.Mvc.Testing and Microsoft.AspNetCore.TestHost to preview 2.
• Increment prerelease iteration from preview 1 to preview 2 in versioning props.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/AspNet.Security.OpenId/OpenIdAuthenticationInitializer.cs	Adjusts authority trailing-slash check to use a StringComparison overload.
global.json	Updates pinned .NET SDK/tool version to preview 2.
eng/Versions.props	Updates prerelease iteration number to 2.
Directory.Packages.props	Updates ASP.NET Core test package versions to preview 2.

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[Copilot]

string.EndsWith('/', StringComparison.Ordinal) is not an overload available on string in current stable .NET APIs, and it also won’t bind to MemoryExtensions.EndsWith because a char can’t be converted to ReadOnlySpan<char>. This risks a compile break. Prefer EndsWith("/", StringComparison.Ordinal) (string literal) if you want an explicit comparison, or keep the EndsWith('/') char overload.

Suggested change

	if (!options.Authority.OriginalString.EndsWith('/', StringComparison.Ordinal))
	if (!options.Authority.OriginalString.EndsWith("/", StringComparison.Ordinal))