build(deps): bump github.com/aws/aws-sdk-go from 1.51.1 to 1.51.21

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.51.1 to 1.51.21.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](aws/aws-sdk-go@v1.51.1...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] <[email protected]>

go.mod

@@ -6,7 +6,7 @@ require (
 	cloud.google.com/go/monitoring v1.17.0
 	github.com/DataDog/datadog-go v4.8.3+incompatible
 	github.com/aws/aws-lambda-go v1.46.0
-	github.com/aws/aws-sdk-go v1.51.1
+	github.com/aws/aws-sdk-go v1.51.21
 	github.com/golang/mock v1.6.0
 	github.com/google/go-cmp v0.6.0
 	github.com/newrelic/go-agent v3.24.1+incompatible

go.sum

@@ -12,8 +12,8 @@ github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2y
 github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE=
 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 v1.51.1 h1:AFvTihcDPanvptoKS09a4yYmNtPm3+pXlk6uYHmZiFk=
-github.com/aws/aws-sdk-go v1.51.1/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/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=