Bump go.etcd.io/etcd/client/v3 from 3.5.7 to 3.5.12

Bumps [go.etcd.io/etcd/client/v3](https://github.com/etcd-io/etcd) from 3.5.7 to 3.5.12.
- [Release notes](https://github.com/etcd-io/etcd/releases)
- [Commits](etcd-io/etcd@v3.5.7...v3.5.12)

---
updated-dependencies:
- dependency-name: go.etcd.io/etcd/client/v3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -4,8 +4,8 @@ go 1.16
 
 require (
 	github.com/mitchellh/hashstructure v1.1.0
-	go.etcd.io/etcd/api/v3 v3.5.7
-	go.etcd.io/etcd/client/v3 v3.5.7
+	go.etcd.io/etcd/api/v3 v3.5.12
+	go.etcd.io/etcd/client/v3 v3.5.12
 	go.uber.org/zap v1.24.0
 	go.unistack.org/micro/v3 v3.10.39
 )