Bump github.com/openzipkin/zipkin-go in /exporters/zipkin

Bumps [github.com/openzipkin/zipkin-go](https://github.com/openzipkin/zipkin-go) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/openzipkin/zipkin-go/releases)
- [Commits](openzipkin/zipkin-go@v0.4.1...v0.4.2)

---
updated-dependencies:
- dependency-name: github.com/openzipkin/zipkin-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

exporters/zipkin/go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/go-logr/logr v1.2.4
 	github.com/go-logr/stdr v1.2.2
 	github.com/google/go-cmp v0.5.9
-	github.com/openzipkin/zipkin-go v0.4.1
+	github.com/openzipkin/zipkin-go v0.4.2
 	github.com/stretchr/testify v1.8.4
 	go.opentelemetry.io/otel v1.16.0
 	go.opentelemetry.io/otel/sdk v1.16.0

exporters/zipkin/go.sum

@@ -7,8 +7,8 @@ github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/openzipkin/zipkin-go v0.4.1 h1:kNd/ST2yLLWhaWrkgchya40TJabe8Hioj9udfPcEO5A=
-github.com/openzipkin/zipkin-go v0.4.1/go.mod h1:qY0VqDSN1pOBN94dBc6w2GJlWLiovAyg7Qt6/I9HecM=
+github.com/openzipkin/zipkin-go v0.4.2 h1:zjqfqHjUpPmB3c1GlCvvgsM1G4LkvqQbBDueDOCg/jA=
+github.com/openzipkin/zipkin-go v0.4.2/go.mod h1:ZeVkFjuuBiSy13y8vpSDCjMi9GoI3hPpCJSBx/EYFhY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=