vendor: update buildkit to master@8b7bcb900d3c

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go

@@ -33,6 +33,7 @@ const (
 // config represents the configuration options available for the http.Handler
 // and http.Transport types.
 type config struct {
+	ServerName        string
 	Tracer            trace.Tracer
 	Meter             metric.Meter
 	Propagators       propagation.TextMapPropagator
@@ -198,3 +199,11 @@ func WithClientTrace(f func(context.Context) *httptrace.ClientTrace) Option {
 		c.ClientTrace = f
 	})
 }
+
+// WithServerName returns an Option that sets the name of the (virtual) server
+// handling requests.
+func WithServerName(server string) Option {
+	return optionFunc(func(c *config) {
+		c.ServerName = server
+	})
+}