Bump golang.org/x/net from 0.20.0 to 0.21.0

[dependabot[bot]]

Bumps golang.org/x/net from 0.20.0 to 0.21.0.

Commits

• 73d21fd go.mod: update golang.org/x dependencies
• 643fd16 html: fix SOLIDUS '/' handling in attribute parsing
• 73e4b50 dns/dnsmessage: allow name compression for SRV resource parsing
• b2208d0 internal/quic/qlog: fix typo
• 0d0b98c http2: avoid goroutine starvation in TestServer_Push_RejectAfterGoAway
• 07e05fd http2: remove suspicious uint32->v conversion in frame code
• 26b646e quic: avoid deadlock in Endpoint.Close
• See full diff in compare view

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