Downgrade to the latest go-containerregistry tag that WGE can use

WGE uses helm which requires docker/docker v20, when building with v23
we get the error:

../../go/pkg/mod/oras.land/[email protected]/pkg/auth/docker/login_tls.go:181:30: assignment mismatch: 3 variables but registry.PingV2Registry returns 2 values

The most recent tag of go-containerregistry that uses docker v20 is
v0.12.0:

- google/go-containerregistry@969699e

Author: foot

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/go-logr/logr v1.2.4
 	github.com/go-logr/zapr v1.2.3
 	github.com/google/go-cmp v0.5.9
-	github.com/google/go-containerregistry v0.15.2
+	github.com/google/go-containerregistry v0.12.0
 	github.com/imdario/mergo v0.3.13
 	github.com/jenkins-x/go-scm v1.13.4
 	github.com/onsi/gomega v1.27.5

go.sum

@@ -209,8 +209,8 @@ github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/go-containerregistry v0.15.2 h1:MMkSh+tjSdnmJZO7ljvEqV1DjfekB6VUEAZgy3a+TQE=
-github.com/google/go-containerregistry v0.15.2/go.mod h1:wWK+LnOv4jXMM23IT/F1wdYftGWGr47Is8CG+pmHK1Q=
+github.com/google/go-containerregistry v0.12.0 h1:nidOEtFYlgPCRqxCKj/4c/js940HVWplCWc5ftdfdUA=
+github.com/google/go-containerregistry v0.12.0/go.mod h1:sdIK+oHQO7B93xI8UweYdl887YhuIwg9vz8BSLH3+8k=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
 github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
@@ -657,7 +657,7 @@ golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.8.0 h1:vSDcovVPld282ceKgDimkRSC8kpaH1dgyc9UMzlt84Y=
+golang.org/x/tools v0.7.0 h1:W4OVu8VVOaIO0yzWMNdepAulS7YfoS3Zabrm8DOXXU4=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=