chore(deps): update module sigs.k8s.io/controller-runtime to v0.21.0 (#263)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -15,7 +15,7 @@ require (
 	k8s.io/api v0.33.1
 	k8s.io/apimachinery v0.33.1
 	k8s.io/client-go v0.33.1
-	sigs.k8s.io/controller-runtime v0.20.4
+	sigs.k8s.io/controller-runtime v0.21.0
 )
 
 require (

go.sum

@@ -276,8 +276,8 @@ 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=
-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/controller-runtime v0.21.0 h1:CYfjpEuicjUecRk+KAeyYh+ouUBn4llGyDYytIGcJS8=
+sigs.k8s.io/controller-runtime v0.21.0/go.mod h1:OSg14+F65eWqIu4DceX7k/+QRAbTTvxeQSNSOQpukWM=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 h1:gBQPwqORJ8d8/YNZWEjoZs7npUVDpVXUUOFfW6CgAqE=
 sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8/go.mod h1:mdzfpAEoE6DHQEN0uh9ZbOCuHbLK5wOm7dK4ctXE9Tg=
 sigs.k8s.io/kustomize/api v0.19.0 h1:F+2HB2mU1MSiR9Hp1NEgoU2q9ItNOaBJl0I4Dlus5SQ=