Bump go.mongodb.org/mongo-driver from 1.8.4 to 1.9.0

Bumps [go.mongodb.org/mongo-driver](https://github.com/mongodb/mongo-go-driver) from 1.8.4 to 1.9.0.
- [Release notes](https://github.com/mongodb/mongo-go-driver/releases)
- [Commits](https://github.com/mongodb/mongo-go-driver/compare/v1.8.4...v1.9.0)

---
updated-dependencies:
- dependency-name: go.mongodb.org/mongo-driver
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -116,7 +116,7 @@ require (
 	github.com/xdg-go/stringprep v1.0.2 // indirect
 	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
 	go.etcd.io/etcd/client/v3 v3.5.2
-	go.mongodb.org/mongo-driver v1.8.4
+	go.mongodb.org/mongo-driver v1.9.0
 	go.opencensus.io v0.23.0 // indirect
 	gocloud.dev v0.25.0
 	gocloud.dev/pubsub/natspubsub v0.25.0

go.sum

@@ -884,8 +884,8 @@ go.etcd.io/etcd/client/v2 v2.305.0/go.mod h1:h9puh54ZTgAKtEbut2oe9P4L/oqKCVB6xsX
 go.etcd.io/etcd/client/v3 v3.5.0/go.mod h1:AIKXXVX/DQXtfTEqBryiLTUXwON+GuvO6Z7lLS/oTh0=
 go.etcd.io/etcd/client/v3 v3.5.2 h1:WdnejrUtQC4nCxK0/dLTMqKOB+U5TP/2Ya0BJL+1otA=
 go.etcd.io/etcd/client/v3 v3.5.2/go.mod h1:kOOaWFFgHygyT0WlSmL8TJiXmMysO/nNUlEsSsN6W4o=
-go.mongodb.org/mongo-driver v1.8.4 h1:NruvZPPL0PBcRJKmbswoWSrmHeUvzdxA3GCPfD/NEOA=
-go.mongodb.org/mongo-driver v1.8.4/go.mod h1:0sQWfOeY63QTntERDJJ/0SuKK0T1uVSgKCuAROlKEPY=
+go.mongodb.org/mongo-driver v1.9.0 h1:f3aLGJvQmBl8d9S40IL+jEyBC6hfLPbJjv9t5hEM9ck=
+go.mongodb.org/mongo-driver v1.9.0/go.mod h1:0sQWfOeY63QTntERDJJ/0SuKK0T1uVSgKCuAROlKEPY=
 go.opencensus.io v0.15.0/go.mod h1:UffZAU+4sDEINUGP/B7UfBBkq4fqLu9zXAX7ke6CHW0=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=