chore(deps): update github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images commit hash to 8475759 (sourcegraph#3993)

Co-authored-by: Renovate Bot <[email protected]>

Author: sourcegraph-bot

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/docker/docker v1.13.1 // indirect
 	github.com/pulumi/pulumi v1.12.0
 	github.com/sethgrid/pester v1.1.0
-	github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-20210927082542-892fa86b4bf8
+	github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-20210927092150-847575901aff
 	github.com/sourcegraph/update-docker-tags v0.8.0
 	golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 // indirect
 	golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 // indirect

go.sum

@@ -631,6 +631,8 @@ github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-2021092707440
 github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-20210927074401-a4d5bbc954fa/go.mod h1:RrAuT1kEkrErj2fmr4f3pPDoBF0ruFBhOSC1yORlv24=
 github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-20210927082542-892fa86b4bf8 h1:b2yeJOrG/4q8oTmWpZnDXezojRgGnG4QT2edm9F/ONU=
 github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-20210927082542-892fa86b4bf8/go.mod h1:RrAuT1kEkrErj2fmr4f3pPDoBF0ruFBhOSC1yORlv24=
+github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-20210927092150-847575901aff h1:ea39gF2YvhQvYZ0/c2w+2tRMWCnjnRTSsYzMnWfW3aw=
+github.com/sourcegraph/sourcegraph/enterprise/dev/ci/images v0.0.0-20210927092150-847575901aff/go.mod h1:RrAuT1kEkrErj2fmr4f3pPDoBF0ruFBhOSC1yORlv24=
 github.com/sourcegraph/update-docker-tags v0.8.0 h1:TlW1kptkWCT/va/+x1In3qBZGkRPLg/aL0b/feqBgII=
 github.com/sourcegraph/update-docker-tags v0.8.0/go.mod h1:lCDsoUnk/ASDbm7UxE7tU3qAUhQxA7xykELHXcLeKFM=
 github.com/spf13/cast v1.2.0/go.mod h1:r2rcYCSwa1IExKTDiTfzaxqT2FNHs8hODu4LnUfgKEg=