Bump github.com/aws/aws-sdk-go from 1.51.16 to 1.51.21

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.51.16 to 1.51.21.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](aws/aws-sdk-go@v1.51.16...v1.51.21)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go
  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 1.19
 
 require (
 	github.com/aws/aws-lambda-go v1.46.0
-	github.com/aws/aws-sdk-go v1.51.16
+	github.com/aws/aws-sdk-go v1.51.21
 	github.com/kelseyhightower/envconfig v1.4.0
 )
 

go.sum

@@ -1,7 +1,7 @@
 github.com/aws/aws-lambda-go v1.46.0 h1:UWVnvh2h2gecOlFhHQfIPQcD8pL/f7pVCutmFl+oXU8=
 github.com/aws/aws-lambda-go v1.46.0/go.mod h1:dpMpZgvWx5vuQJfBt0zqBha60q7Dd7RfgJv23DymV8A=
-github.com/aws/aws-sdk-go v1.51.16 h1:vnWKK8KjbftEkuPX8bRj3WHsLy1uhotn0eXptpvrxJI=
-github.com/aws/aws-sdk-go v1.51.16/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
+github.com/aws/aws-sdk-go v1.51.21 h1:UrT6JC9R9PkYYXDZBV0qDKTualMr+bfK2eboTknMgbs=
+github.com/aws/aws-sdk-go v1.51.21/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=