Bump github.com/aws/aws-sdk-go from 1.51.18 to 1.51.21

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.51.18 to 1.51.21.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](aws/aws-sdk-go@v1.51.18...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

@@ -3,7 +3,7 @@ module go.sia.tech/gofakes3
 go 1.16
 
 require (
-	github.com/aws/aws-sdk-go v1.51.18
+	github.com/aws/aws-sdk-go v1.51.21
 	github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46
 	github.com/shabbyrobe/gocovmerge v0.0.0-20190829150210-3e036491d500
 	github.com/spf13/afero v1.11.0

go.sum

@@ -1150,8 +1150,8 @@ github.com/apache/arrow/go/v10 v10.0.1/go.mod h1:YvhnlEePVnBS4+0z3fhPfUy7W1Ikj0I
 github.com/apache/arrow/go/v11 v11.0.0/go.mod h1:Eg5OsL5H+e299f7u5ssuXsuHQVEGC4xei5aX110hRiI=
 github.com/apache/arrow/go/v12 v12.0.0/go.mod h1:d+tV/eHZZ7Dz7RPrFKtPK02tpr+c9/PEd/zm8mDS9Vg=
 github.com/apache/thrift v0.16.0/go.mod h1:PHK3hniurgQaNMZYaCLEqXKsYK8upmhPbmdP2FXSqgU=
-github.com/aws/aws-sdk-go v1.51.18 h1:JKrk49ZlBTyKa4+droU7U/hk0QG84v91xaA58O0LPdo=
-github.com/aws/aws-sdk-go v1.51.18/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/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
 github.com/boombuler/barcode v1.0.1/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=