build(deps): bump oras.land/oras-go/v2 from 2.5.0 to 2.6.0

Bumps [oras.land/oras-go/v2](https://github.com/oras-project/oras-go) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/oras-project/oras-go/releases)
- [Commits](https://github.com/oras-project/oras-go/compare/v2.5.0...v2.6.0)

---
updated-dependencies:
- dependency-name: oras.land/oras-go/v2
  dependency-version: 2.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -43,7 +43,7 @@ require (
 	k8s.io/client-go v0.33.0
 	k8s.io/klog/v2 v2.130.1
 	k8s.io/kubectl v0.33.0
-	oras.land/oras-go/v2 v2.5.0
+	oras.land/oras-go/v2 v2.6.0
 	sigs.k8s.io/controller-runtime v0.20.4
 	sigs.k8s.io/yaml v1.4.0
 )

go.sum

@@ -526,8 +526,8 @@ k8s.io/kubectl v0.33.0 h1:HiRb1yqibBSCqic4pRZP+viiOBAnIdwYDpzUFejs07g=
 k8s.io/kubectl v0.33.0/go.mod h1:gAlGBuS1Jq1fYZ9AjGWbI/5Vk3M/VW2DK4g10Fpyn/0=
 k8s.io/utils v0.0.0-20250321185631-1f6e0b77f77e h1:KqK5c/ghOm8xkHYhlodbp6i6+r+ChV2vuAuVRdFbLro=
 k8s.io/utils v0.0.0-20250321185631-1f6e0b77f77e/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
-oras.land/oras-go/v2 v2.5.0 h1:o8Me9kLY74Vp5uw07QXPiitjsw7qNXi8Twd+19Zf02c=
-oras.land/oras-go/v2 v2.5.0/go.mod h1:z4eisnLP530vwIOUOJeBIj0aGI0L1C3d53atvCBqZHg=
+oras.land/oras-go/v2 v2.6.0 h1:X4ELRsiGkrbeox69+9tzTu492FMUu7zJQW6eJU+I2oc=
+oras.land/oras-go/v2 v2.6.0/go.mod h1:magiQDfG6H1O9APp+rOsvCPcW1GD2MM7vgnKY0Y+u1o=
 sigs.k8s.io/controller-runtime v0.20.4 h1:X3c+Odnxz+iPTRobG4tp092+CvBU9UK0t/bRf+n0DGU=
 sigs.k8s.io/controller-runtime v0.20.4/go.mod h1:xg2XB0K5ShQzAgsoujxuKN4LNXR2LfwwHsPj7Iaw+XY=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 h1:gBQPwqORJ8d8/YNZWEjoZs7npUVDpVXUUOFfW6CgAqE=