Bump github.com/stretchr/testify from 1.11.1 to 1.12.1 (#441)

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.11.1 to 1.12.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.11.1...v1.12.1)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-version: 1.12.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

go.mod

@@ -18,7 +18,7 @@ require (
 	github.com/migueleliasweb/go-github-mock v1.5.0
 	github.com/sigstore/sigstore-go v1.3.0
 	github.com/spf13/cobra v1.10.2
-	github.com/stretchr/testify v1.11.1
+	github.com/stretchr/testify v1.12.1
 	google.golang.org/protobuf v1.36.12
 	sigs.k8s.io/release-utils v0.12.4
 )
@@ -57,7 +57,6 @@ require (
 	github.com/coreos/go-oidc/v3 v3.20.0 // indirect
 	github.com/cyberphone/json-canonicalization v0.0.0-20241213102144-19d51d7fe467 // indirect
 	github.com/cyphar/filepath-securejoin v0.6.1 // indirect
-	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/digitorus/pkcs7 v0.0.0-20250730155240-ffadbf3f398c // indirect
 	github.com/digitorus/timestamp v0.0.0-20250524132541-c45532741eea // indirect
 	github.com/docker/cli v29.6.2+incompatible // indirect
@@ -126,7 +125,6 @@ require (
 	github.com/pjbgf/sha1cd v0.6.0 // indirect
 	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/protobom/protobom v0.5.8 // indirect
 	github.com/regclient/regclient v0.11.5 // indirect
 	github.com/sassoftware/relic v7.2.1+incompatible // indirect

go.sum

@@ -463,8 +463,8 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
-github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/stretchr/testify v1.12.1 h1:EuwCh5fleGS7H32xRwO3wRGT7DxrDhLAT6FF8MpWDWE=
+github.com/stretchr/testify v1.12.1/go.mod h1:MDEgiDPPsNp5cuIrHPPCyornHKgEVbtFUmoNlxoYthg=
 github.com/sudo-bmitch/oci-digest v0.1.2 h1:are0qzWTsFZGZ3Uvdi9OSztJszSWaab6iqquMEEB7rw=
 github.com/sudo-bmitch/oci-digest v0.1.2/go.mod h1:SH6l5OIe0islKBZBedjiPOeET/0QwGL+/oYfQt51uQo=
 github.com/terminalstatic/go-xsd-validate v0.1.6 h1:TenYeQ3eY631qNi1/cTmLH/s2slHPRKTTHT+XSHkepo=