Fix exception description for PooledConnectionLifetime

[kevincathcart-cas]

Summary

This fixes the exception documentation for SocketsHttpHandler.PooledConnectionLifetime

The documentation currently reads:

Exceptions

ArgumentOutOfRangeException
The value specified is less than Zero or is equal to InfiniteTimeSpan.

However, the code is:

        public TimeSpan PooledConnectionIdleTimeout
        {
            get => _settings._pooledConnectionIdleTimeout;
            set
            {
                if (value < TimeSpan.Zero && value != Timeout.InfiniteTimeSpan)
                {
                    throw new ArgumentOutOfRangeException(nameof(value));
                }

                CheckDisposedOrStarted();
                _settings._pooledConnectionIdleTimeout = value;
            }
        }

So InfiniteTimeSpan is allowed, which makes sense given that it is documented as the default.

So updated to reflect the code, matching the verbiage from PooledConnectionIdleTimeout, which has a nearly identical implementation.

The only thing I have not verified is if the old message was valid for past versions, but it seems unlikely.

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Learn Build status updates of commit 2e409c1:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Net.Http/SocketsHttpHandler.xml	✅Succeeded	View

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