Bump chainguard.dev/apko from 0.19.6 to 0.21.0

Bumps [chainguard.dev/apko](https://github.com/chainguard-dev/apko) from 0.19.6 to 0.21.0.
- [Release notes](https://github.com/chainguard-dev/apko/releases)
- [Changelog](https://github.com/chainguard-dev/apko/blob/main/NEWS.md)
- [Commits](chainguard-dev/apko@v0.19.6...v0.21.0)

---
updated-dependencies:
- dependency-name: chainguard.dev/apko
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -3,7 +3,7 @@ module github.com/chainguard-dev/terraform-provider-apko
 go 1.23.2
 
 require (
-	chainguard.dev/apko v0.19.6
+	chainguard.dev/apko v0.21.0
 	github.com/chainguard-dev/clog v1.5.1
 	github.com/chainguard-dev/terraform-provider-oci v0.0.17
 	github.com/google/go-cmp v0.6.0
@@ -183,7 +183,7 @@ require (
 	go.opentelemetry.io/otel v1.32.0 // indirect
 	go.opentelemetry.io/otel/metric v1.32.0 // indirect
 	go.opentelemetry.io/otel/trace v1.32.0 // indirect
-	go.step.sm/crypto v0.54.2 // indirect
+	go.step.sm/crypto v0.55.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/crypto v0.31.0 // indirect

go.sum

@@ -1,5 +1,5 @@
-chainguard.dev/apko v0.19.6 h1:ZlWL5csihT4kBZmACpNOGqbb7DgqUS2IdmcNsnjwG18=
-chainguard.dev/apko v0.19.6/go.mod h1:Xwby6unVOg4xJZ11l2kyHdr9sykJmmEaWvgoT18CFbI=
+chainguard.dev/apko v0.21.0 h1:McqW15qcBpV7vlAc3SBoD8Ruxjqi+rmO/4Ls1H1jLMw=
+chainguard.dev/apko v0.21.0/go.mod h1:Dz/1cWdn6w53ZbMR2qA0tHcqhLhb2YptAWCk5r2pByw=
 chainguard.dev/go-grpc-kit v0.17.6 h1:lwIs9LmSnm8jwrH1QmigCwMP6MYkIBENq/0xGduYZss=
 chainguard.dev/go-grpc-kit v0.17.6/go.mod h1:ZNaXn2KEO++2u2WveHs65krYiHmAEGjYLeEtfaQaOWU=
 chainguard.dev/sdk v0.1.28 h1:xLQv0JxiGhqVKOL059DmTReTjrKFhUsP5U1W6cgr+jQ=
@@ -444,8 +444,8 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
-github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/theupdateframework/go-tuf v0.7.0 h1:CqbQFrWo1ae3/I0UCblSbczevCCbS31Qvs5LdxRWqRI=
 github.com/theupdateframework/go-tuf v0.7.0/go.mod h1:uEB7WSY+7ZIugK6R1hiBMBjQftaFzn7ZCDJcp1tCUug=
 github.com/titanous/rocacheck v0.0.0-20171023193734-afe73141d399 h1:e/5i7d4oYZ+C1wj2THlRK+oAhjeS/TRQwMfkIuet3w0=
@@ -498,8 +498,8 @@ go.opentelemetry.io/otel/trace v1.32.0 h1:WIC9mYrXf8TmY/EXuULKc8hR17vE+Hjv2cssQD
 go.opentelemetry.io/otel/trace v1.32.0/go.mod h1:+i4rkvCraA+tG6AzwloGaCtkx53Fa+L+V8e9a7YvhT8=
 go.opentelemetry.io/proto/otlp v1.3.1 h1:TrMUixzpM0yuc/znrFTP9MMRh8trP93mkCiDVeXrui0=
 go.opentelemetry.io/proto/otlp v1.3.1/go.mod h1:0X1WI4de4ZsLrrJNLAQbFeLCm3T7yBkR0XqQ7niQU+8=
-go.step.sm/crypto v0.54.2 h1:3LSA5nYDQvcd484OSx7xsS3XDqQ7/WZjVqvq0+a0fWc=
-go.step.sm/crypto v0.54.2/go.mod h1:1+OjUozd5aA3TkBJfr5Aobd6vNt9F70n1DagcoBh3Pc=
+go.step.sm/crypto v0.55.0 h1:575Q7NahuM/ZRxUVN1GkO2e1aDYQJqIIg+nbfOajQJk=
+go.step.sm/crypto v0.55.0/go.mod h1:MgEmD1lgwsuzZwTgI0GwKapHjKVEQLVggSvHuf3bYnU=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=