chore(deps): update upm project dependency com.unity.transport to v2.6.0 (develop)

[unity-renovate]

This PR contains the following updates:

Package	Type	Update	Editor	Change
com.unity.transport	dependencies	minor	✅ Compatible	2.5.3 -> 2.6.0

✅ Editor bump: Not required for testproject-tools-integration/Packages/manifest.json

This is probably safe to merge for this project

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Release Notes

com.unity.transport (com.unity.transport)

v2.6.0

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New Features

• It is now possible to increase the reliable pipeline window size past 64. The maximum is technically 2040 but it is strongly recommended to stick to 256 or below. The documentation has more details on this change.
• Added a new NetworkDriver.GetMaxSupportedPayloadSize method that can be used to find out what the maximum payload size is on a given connection/pipeline. It's equivalent to fetching the Capacity property of the DataStreamWriter returned by BeginSend on the same connection and pipeline, but does not require acquiring a packet buffer like BeginSend does.

Changes

• Integration with the logging package (com.unity.logging) has been removed. Logs are now only written to the default Debug.Log mechanism. This should have no impact even to most users of the logging package, since its default configuration forwards Debug.Log logs to the default logger.
• When using the reliable pipeline stage, the configured window size will now always be internally rounded up to the next multiple of 8 (if not already one). This change should be completely transparent to everyone, as the only impact is slightly improved bandwidth if using an atypical window size.
• NetworkDriver.GetMaxSupportedMessageSize can now return different negative values to represent different errors. All values map to the Error.StatusCode enum.
• Updated the Burst package dependency to version 1.8.24.
• Updated the Mathematics package dependency to version 1.3.2.

Fixes

• Fixed an issue where the DF (don't fragment) bit would be set even when MTU discovery was disabled, which could cause problems in environments where the MTU is more limited (like with some VPN providers).
• Prevented an extraneous error from being logged when a send would fail within a pipeline (which already logs an error).
• Fixed a bug where NetworkDriver.CheckHostnameLookupStatus would throw an exception when checking the status of connections that either did not use hostname lookup at all, or for which the hostname lookup had already finished in a previous driver update.
• Prevented an error from being shown on Windows when a UDP socket bound to an IPv4 address received IPv6 packets (or vice-versa). Such packets were always discarded anyway, but now they won't generate errors at least.
• Fixed a bug in NetworkDriver.MaxHeaderSize where it would return a size one byte larger than the actual maximum header size.
• Fixed an issue where TLS alert messages would lead to a decryption failure, leading to an error being logged even in normal disconnection scenarios.
• NetworkDriver.Bound and NetworkDriver.Listening will now return false if accessed on a disposed driver, instead of throwing a NullReferenceException (or causing an application segfault if safety checks are disabled).

v2.5.3

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Fixes

• Fixed an issue where port 0 would be used when connecting over secure WebSockets (WSS) if using the version of the NetworkDriver.Connect method that accepts hostnames.

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