Update Rust crate h2 to v0.4.7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
h2	dependencies	patch	0.4.5 -> 0.4.7

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Release Notes

hyperium/h2 (h2)

v0.4.7

Compare Source

• Fix treating HEADERS frames with a non-zero content-length but END_STREAM flag as malformed.
• Fix notifying the stream task when automatically reset on receipt of a stream error.

v0.4.6

Compare Source

• Add current_max_send_streams() and current_max_recv_streams() to client::SendRequest.
• Fix sending a PROTOCOL_ERROR instead of REFUSED_STREAM when receiving oversized headers.
• Fix notifying a PushPromise task properly.
• Fix notifying a stream task when reset.

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