[Build-deps]: Bump contrib.go.opencensus.io/exporter/jaeger (#1012)

Bumps [contrib.go.opencensus.io/exporter/jaeger](https://github.com/census-ecosystem/opencensus-go-exporter-jaeger) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/census-ecosystem/opencensus-go-exporter-jaeger/releases)
- [Commits](census-ecosystem/opencensus-go-exporter-jaeger@v0.2.0...v0.2.1)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -1,7 +1,7 @@
 module github.com/cs3org/reva
 
 require (
-	contrib.go.opencensus.io/exporter/jaeger v0.2.0
+	contrib.go.opencensus.io/exporter/jaeger v0.2.1
 	contrib.go.opencensus.io/exporter/prometheus v0.2.0
 	github.com/BurntSushi/toml v0.3.1
 	github.com/Masterminds/goutils v1.1.0 // indirect