chore(deps): update dependency kubernetes-sigs/controller-tools to v0.20.0

Author: renovate[bot]

.tools_versions.yaml

@@ -1,7 +1,7 @@
 # renovate: datasource=github-tags depName=kubernetes/code-generator
 code-generator: "0.35.0"
 # renovate: datasource=github-releases depName=kubernetes-sigs/controller-tools
-controller-tools: "0.19.0"
+controller-tools: "0.20.0"
 # renovate: datasource=github-releases depName=golangci/golangci-lint
 golangci-lint: "2.7.2"
 # TODO: Renovate comment is missing. This needs to be added at some point.