Update kube-rbac-proxy Docker tag to v0.20.1

| datasource | package                        | from    | to      |
| ---------- | ------------------------------ | ------- | ------- |
| docker     | quay.io/brancz/kube-rbac-proxy | v0.20.0 | v0.20.1 |


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

Author: renovate[bot]

Makefile

@@ -76,7 +76,7 @@ KRP_IMAGE_BASE ?= quay.io/brancz/kube-rbac-proxy
 
 # kube-rbac-proxy image tag
 # renovate: datasource=docker depName=kube-rbac-proxy packageName=quay.io/brancz/kube-rbac-proxy
-KRP_IMAGE_VERSION ?= v0.20.0
+KRP_IMAGE_VERSION ?= v0.20.1
 
 # image pull secret name: eg regcred
 IMAGE_PULL_SECRET_NAME ?=