chore(deps): update github.com/redpanda-data/redpanda/src/go/rpk digest to 3cfce47

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/redpanda-data/redpanda/src/go/rpk	indirect	digest	c979dc7 → 3cfce47

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: provider/go.sum

Command failed: go get -t ./...
go: module github.com/redpanda-data/redpanda/src/go/rpk@v0.0.0-20260820072051-3cfce474a872 requires go >= 1.26.5; switching to go1.26.8
go: downloading google.golang.org/grpc v1.83.0
go: downloading google.golang.org/protobuf v1.36.12
go: downloading github.com/spf13/cobra v1.10.2
go: downloading golang.org/x/mod v0.36.0
go: downloading golang.org/x/exp v0.0.0-20260312153236-7ab1446f8b90
go: downloading google.golang.org/genproto v0.0.0-20260511170946-3700d4141b60
go: downloading buf.build/gen/go/redpandadata/cloud/protocolbuffers/go v1.36.12-20260817162420-6033b8c28212.1
go: downloading buf.build/gen/go/redpandadata/dataplane/protocolbuffers/go v1.36.11-20260515102404-69b6826fde5c.1
go: downloading github.com/redpanda-data/redpanda/src/go/rpk v0.0.0-20260820072051-3cfce474a872
go: downloading github.com/fatih/color v1.19.0
go: downloading github.com/mattn/go-isatty v0.0.21
go: downloading golang.org/x/tools v0.45.0
go: downloading github.com/BurntSushi/toml v1.6.0
go: downloading github.com/spf13/pflag v1.0.10
go: downloading github.com/segmentio/asm v1.2.1
go: downloading buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.12-20260709200747-435963d16310.1
go: downloading buf.build/gen/go/grpc-ecosystem/grpc-gateway/protocolbuffers/go v1.36.12-20260416204259-4836b6d55230.1
go: downloading buf.build/gen/go/redpandadata/common/protocolbuffers/go v1.36.12-20260323171043-6e06f84ad823.1
go: downloading buf.build/gen/go/redpandadata/core/protocolbuffers/go v1.36.12-20260714112317-973b760dcc8a.1
go: downloading go.uber.org/zap v1.28.0
go: downloading github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee
go: downloading github.com/twmb/tlscfg v1.3.0
go: downloading github.com/klauspost/compress v1.19.1
go: downloading google.golang.org/api v0.274.0
go: downloading github.com/spf13/cast v1.10.0
go: downloading github.com/Ladicle/tabwriter v1.0.0
go: downloading github.com/briandowns/spinner v1.23.2
go: downloading github.com/twmb/franz-go/pkg/kadm v1.18.0
go: downloading github.com/twmb/franz-go v1.21.6
go: downloading cloud.google.com/go/iam v1.11.0
go: downloading github.com/googleapis/gax-go/v2 v2.21.0
go: downloading github.com/twmb/franz-go/pkg/kmsg v1.13.1
go: downloading cloud.google.com/go/monitoring v1.29.0
go: downloading go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.68.0
go: downloading github.com/pierrec/lz4/v4 v4.1.28
go: downloading github.com/redpanda-data/redpanda v26.2.2+incompatible
go: github.com/pulumiverse/pulumi-redpanda/provider imports
	github.com/redpanda-data/terraform-provider-redpanda/redpanda imports
	github.com/redpanda-data/terraform-provider-redpanda/redpanda/utils imports
	github.com/redpanda-data/redpanda/src/go/rpk/pkg/cloudapi: cannot find module providing package github.com/redpanda-data/redpanda/src/go/rpk/pkg/cloudapi
go: github.com/pulumiverse/pulumi-redpanda/provider imports
	github.com/redpanda-data/terraform-provider-redpanda/redpanda imports
	github.com/redpanda-data/terraform-provider-redpanda/redpanda/utils imports
	github.com/redpanda-data/redpanda/src/go/rpk/pkg/net: cannot find module providing package github.com/redpanda-data/redpanda/src/go/rpk/pkg/net