build(deps): bump github.com/aws/aws-sdk-go from 1.28.5 to 1.28.9 (#3625)

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.28.5 to 1.28.9.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Changelog](https://github.com/aws/aws-sdk-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.28.5...v1.28.9)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/DataDog/datadog-go v3.3.1+incompatible // indirect
 	github.com/Shopify/sarama v1.21.0 // indirect
 	github.com/apache/thrift v0.13.0 // indirect
-	github.com/aws/aws-sdk-go v1.28.5
+	github.com/aws/aws-sdk-go v1.28.9
 	github.com/caddyserver/caddy v1.0.4
 	github.com/coredns/federation v0.0.0-20190818181423-e032b096babe
 	github.com/coreos/go-systemd v0.0.0-20190212144455-93d5ec2c7f76 // indirect

go.sum

@@ -69,6 +69,8 @@ github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb
 github.com/aws/aws-sdk-go v1.23.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.28.5 h1:yYeWPM8w5FoIj3Lo0BDZxRyDpTveKTq/qvnIEPBnev8=
 github.com/aws/aws-sdk-go v1.28.5/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.28.9 h1:grIuBQc+p3dTRXerh5+2OxSuWFi0iXuxbFdTSg0jaW0=
+github.com/aws/aws-sdk-go v1.28.9/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/baiyubin/aliyun-sts-go-sdk v0.0.0-20180326062324-cfa1a18b161f/go.mod h1:AuiFmCCPBSrqvVMvuqFuk0qogytodnVFVSN5CeJB8Gc=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=