build(deps): Bump golang.org/x/net from 0.49.0 to 0.50.0

[dependabot]

Bumps golang.org/x/net from 0.49.0 to 0.50.0.

Commits

• ebddb99 go.mod: update golang.org/x dependencies
• 4a490d4 internal/http3: add Expect: 100-continue support to ClientConn
• 73fe701 internal/http3: add Expect: 100-continue support to Server
• af0c9df html: add NodeType.String() method
• e02fb33 internal/http3: make responseWriter.Flush write headers if not done yet
• da558ff internal/http3: ensure bodyReader cannot be read after being closed
• d7c76fa internal/http3: make responseWriter behave closer to other http.ResponseWriter
• 64b3af9 http2: prevent transport deadlock due to WINDOW_UPDATE that exceeds limit
• 1973e8d internal/http3: add Server support for handling HEAD requests
• 57ea86d icmp, internal/socket, ipv4, ipv6: use binary.NativeEndian
• Additional commits viewable in compare view

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