build(deps): bump github.com/opentracing/opentracing-go (#3990)

Bumps [github.com/opentracing/opentracing-go](https://github.com/opentracing/opentracing-go) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/opentracing/opentracing-go/releases)
- [Changelog](https://github.com/opentracing/opentracing-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/opentracing/opentracing-go/compare/v1.1.0...v1.2.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

go.mod

@@ -24,7 +24,7 @@ require (
 	github.com/matttproud/golang_protobuf_extensions v1.0.1
 	github.com/miekg/dns v1.1.29
 	github.com/opentracing-contrib/go-observer v0.0.0-20170622124052-a52f23424492 // indirect
-	github.com/opentracing/opentracing-go v1.1.0
+	github.com/opentracing/opentracing-go v1.2.0
 	github.com/openzipkin-contrib/zipkin-go-opentracing v0.3.5
 	github.com/philhofer/fwd v1.0.0 // indirect
 	github.com/prometheus/client_golang v1.7.1

go.sum

@@ -376,6 +376,8 @@ github.com/opentracing-contrib/go-observer v0.0.0-20170622124052-a52f23424492 h1
 github.com/opentracing-contrib/go-observer v0.0.0-20170622124052-a52f23424492/go.mod h1:Ngi6UdF0k5OKD5t5wlmGhe/EDKPoUM3BXZSSfIuJbis=
 github.com/opentracing/opentracing-go v1.1.0 h1:pWlfV3Bxv7k65HYwkikxat0+s3pV4bsqf19k25Ur8rU=
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
+github.com/opentracing/opentracing-go v1.2.0 h1:uEJPy/1a5RIPAJ0Ov+OIO8OxWu77jEv+1B0VhjKrZUs=
+github.com/opentracing/opentracing-go v1.2.0/go.mod h1:GxEUsuufX4nBwe+T+Wl9TAgYrxe9dPLANfrWvHYVTgc=
 github.com/openzipkin-contrib/zipkin-go-opentracing v0.3.5 h1:82Tnq9OJpn+h5xgGpss5/mOv3KXdjtkdorFSOUusjM8=
 github.com/openzipkin-contrib/zipkin-go-opentracing v0.3.5/go.mod h1:uVHyebswE1cCXr2A73cRM2frx5ld1RJUCJkFNZ90ZiI=
 github.com/openzipkin/zipkin-go v0.1.6/go.mod h1:QgAqvLzwWbR/WpD4A3cGpPtJrZXNIiJc5AZX7/PBEpw=