Bump go.mongodb.org/mongo-driver in /statistics-service

Bumps [go.mongodb.org/mongo-driver](https://github.com/mongodb/mongo-go-driver) from 1.4.6 to 1.5.0.
- [Release notes](https://github.com/mongodb/mongo-go-driver/releases)
- [Commits](mongodb/mongo-go-driver@1.4.6...v1.5.0)

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

statistics-service/go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/stretchr/testify v1.7.0
 	github.com/swaggo/swag v1.6.7
 	github.com/ugorji/go v1.1.8 // indirect
-	go.mongodb.org/mongo-driver v1.4.6
+	go.mongodb.org/mongo-driver v1.5.0
 	golang.org/x/tools v0.0.0-20200915201639-f4cefd1cb5ba // indirect
 	google.golang.org/protobuf v1.25.0 // indirect
 )