[chore]: Bump golang.org/x/net from 0.17.0 to 0.18.0 (#2390)

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.17.0 to 0.18.0.
- [Commits](https://github.com/golang/net/compare/v0.17.0...v0.18.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

vendor/golang.org/x/crypto/ssh/handshake.go

@@ -11,6 +11,7 @@ import (
 	"io"
 	"log"
 	"net"
+	"strings"
 	"sync"
 )
 
@@ -50,6 +51,10 @@ type handshakeTransport struct {
 	// connection.
 	hostKeys []Signer
 
+	// publicKeyAuthAlgorithms is non-empty if we are the server. In that case,
+	// it contains the supported client public key authentication algorithms.
+	publicKeyAuthAlgorithms []string
+
 	// hostKeyAlgorithms is non-empty if we are the client. In that case,
 	// we accept these key types from the server as host key.
 	hostKeyAlgorithms []string
@@ -141,6 +146,7 @@ func newClientTransport(conn keyingTransport, clientVersion, serverVersion []byt
 func newServerTransport(conn keyingTransport, clientVersion, serverVersion []byte, config *ServerConfig) *handshakeTransport {
 	t := newHandshakeTransport(conn, &config.Config, clientVersion, serverVersion)
 	t.hostKeys = config.hostKeys
+	t.publicKeyAuthAlgorithms = config.PublicKeyAuthAlgorithms
 	go t.readLoop()
 	go t.kexLoop()
 	return t
@@ -649,6 +655,7 @@ func (t *handshakeTransport) enterKeyExchange(otherInitPacket []byte) error {
 	// message with the server-sig-algs extension if the client supports it. See
 	// RFC 8308, Sections 2.4 and 3.1, and [PROTOCOL], Section 1.9.
 	if !isClient && firstKeyExchange && contains(clientInit.KexAlgos, "ext-info-c") {
+		supportedPubKeyAuthAlgosList := strings.Join(t.publicKeyAuthAlgorithms, ",")
 		extInfo := &extInfoMsg{
 			NumExtensions: 2,
 			Payload:       make([]byte, 0, 4+15+4+len(supportedPubKeyAuthAlgosList)+4+16+4+1),