build(deps): update module github.com/aws/smithy-go to v1.21.0 (#810)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/credentials v1.17.33
 	github.com/aws/aws-sdk-go-v2/service/elasticache v1.40.10
 	github.com/aws/aws-sdk-go-v2/service/sts v1.30.8
-	github.com/aws/smithy-go v1.20.4
+	github.com/aws/smithy-go v1.21.0
 	github.com/go-kit/log v0.2.1
 	github.com/prometheus/client_golang v1.20.4
 	github.com/prometheus/common v0.59.1

go.sum

@@ -28,8 +28,8 @@ github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.8 h1:+HpGETD9463PFSj7lX5+eq7a
 github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.8/go.mod h1:bCbAxKDqNvkHxRaIMnyVPXPo+OaPRwvmgzMxbz1VKSA=
 github.com/aws/aws-sdk-go-v2/service/sts v1.30.8 h1:bAi+4p5EKnni+jrfcAhb7iHFQ24bthOAV9t0taf3DCE=
 github.com/aws/aws-sdk-go-v2/service/sts v1.30.8/go.mod h1:NXi1dIAGteSaRLqYgarlhP/Ij0cFT+qmCwiJqWh/U5o=
-github.com/aws/smithy-go v1.20.4 h1:2HK1zBdPgRbjFOHlfeQZfpC4r72MOb9bZkiFwggKO+4=
-github.com/aws/smithy-go v1.20.4/go.mod h1:irrKGvNn1InZwb2d7fkIRNucdfwR8R+Ts3wxYa/cJHg=
+github.com/aws/smithy-go v1.21.0 h1:H7L8dtDRk0P1Qm6y0ji7MCYMQObJ5R9CRpyPhRUkLYA=
+github.com/aws/smithy-go v1.21.0/go.mod h1:irrKGvNn1InZwb2d7fkIRNucdfwR8R+Ts3wxYa/cJHg=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=