Made Sentry.Values<T> internal

[jamescrosswell]

Resolves #2665

Sentry.Values is only used internally. Publicly this is exposed in two places and in both cases as IEnumerable<T>:

sentry-dotnet/src/Sentry/SentryEvent.cs

Lines 74 to 95 in 56e5b06

	internal SentryValues<SentryException>? SentryExceptionValues { get; set; }
	/// <summary>
	/// The Sentry Exception interface.
	/// </summary>
	public IEnumerable<SentryException>? SentryExceptions
	{
	get => SentryExceptionValues?.Values ?? Enumerable.Empty<SentryException>();
	set => SentryExceptionValues = value != null ? new SentryValues<SentryException>(value) : null;
	}
	private SentryValues<SentryThread>? SentryThreadValues { get; set; }
	/// <summary>
	/// The Sentry Thread interface.
	/// </summary>
	/// <see href="https://develop.sentry.dev/sdk/event-payloads/threads/"/>
	public IEnumerable<SentryThread>? SentryThreads
	{
	get => SentryThreadValues?.Values ?? Enumerable.Empty<SentryThread>();
	set => SentryThreadValues = value != null ? new SentryValues<SentryThread>(value) : null;
	}

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- Made Sentry.Values<T> internal ([#2771](https://github.com/getsentry/sentry-dotnet/pull/2771))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

Generated by 🚫 dangerJS against 271f03c

[vaind]

Danger was complaining because the changelog entry was missing a # before the number. See a448ab3