Bump go.unistack.org/micro/v3 from 3.8.14 to 3.8.15

Bumps [go.unistack.org/micro/v3](https://github.com/unistack-org/micro) from 3.8.14 to 3.8.15.
- [Release notes](https://github.com/unistack-org/micro/releases)
- [Commits](https://github.com/unistack-org/micro/compare/v3.8.14...v3.8.15)

---
updated-dependencies:
- dependency-name: go.unistack.org/micro/v3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -4,7 +4,7 @@ go 1.16
 
 require (
 	github.com/golang/protobuf v1.5.2
-	go.unistack.org/micro/v3 v3.8.14
+	go.unistack.org/micro/v3 v3.8.15
 	golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b
 	google.golang.org/grpc v1.43.0
 	google.golang.org/protobuf v1.27.1

go.sum

@@ -59,8 +59,8 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 go.unistack.org/micro-proto/v3 v3.1.1 h1:78qRmltwGek5kSQ9tNmDZ9TCRvZM7YDIOgzriKvabjA=
 go.unistack.org/micro-proto/v3 v3.1.1/go.mod h1:DpRhYCBXlmSJ/AAXTmntvlh7kQkYU6eFvlmYAx4BQS8=
-go.unistack.org/micro/v3 v3.8.14 h1:gvGAh11n484XuJFt+YFUvDJUwbn/a/6/NdTdTqeUnis=
-go.unistack.org/micro/v3 v3.8.14/go.mod h1:zEbgew93bFhU+gANJubbbnPP1LtDTQRbM/17QXTbTrY=
+go.unistack.org/micro/v3 v3.8.15 h1:9KzaPmWW4CpThOT8tiq8XEG3YLmVV8hztqnzPBmJudQ=
+go.unistack.org/micro/v3 v3.8.15/go.mod h1:zEbgew93bFhU+gANJubbbnPP1LtDTQRbM/17QXTbTrY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=