Bump github.com/uber/jaeger-client-go

Bumps [github.com/uber/jaeger-client-go](https://github.com/uber/jaeger-client-go) from 2.19.0+incompatible to 2.20.0+incompatible.
- [Release notes](https://github.com/uber/jaeger-client-go/releases)
- [Changelog](https://github.com/jaegertracing/jaeger-client-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/uber/jaeger-client-go/compare/v2.19.0...v2.20.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go

@@ -35,7 +35,7 @@ func BuildJaegerThrift(span *Span) *j.Span {
 		SpanId:        int64(span.context.spanID),
 		ParentSpanId:  int64(span.context.parentID),
 		OperationName: span.operationName,
-		Flags:         int32(span.context.flags),
+		Flags:         int32(span.context.samplingState.flags()),
 		StartTime:     startTime,
 		Duration:      duration,
 		Tags:          buildTags(span.tags, span.tracer.options.maxTagValueLength),