security/advancedtls: fix test that relies on min TLS version

Go 1.22 changed the default TLS minimum version. Toolchains which do not
respect go.mod 'go' version directives will break when executing the
Test/GetCertificatesSNI/Select_serverCert3 test, since it relies on the
private tls.ClientHelloInfo.config fields minimum version matching the
configured tls.ClientHelloInfo.SupportedVersions field. This change just
bumps the version in tls.ClientHelloInfo.SupportedVersions to
tls.VersionTLS12.

This fixes an internal google test.

security/advancedtls/advancedtls_test.go

@@ -942,7 +942,7 @@ func (s) TestGetCertificatesSNI(t *testing.T) {
 				ServerName:        test.serverName,
 				SupportedCurves:   []tls.CurveID{tls.CurveP256},
 				SupportedPoints:   []uint8{pointFormatUncompressed},
-				SupportedVersions: []uint16{tls.VersionTLS10},
+				SupportedVersions: []uint16{tls.VersionTLS12},
 			}
 			gotCertificate, err := serverConfig.GetCertificate(clientHello)
 			if err != nil {