fix(deps): update module github.com/grafana/grafana-operator/v5 to v5.20.0

Author: renovate[bot]

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/crunchydata/postgres-operator v0.0.0-00010101000000-000000000000
 	github.com/envoyproxy/gateway v1.4.2
 	github.com/external-secrets/external-secrets v0.9.11
-	github.com/grafana/grafana-operator/v5 v5.8.0
+	github.com/grafana/grafana-operator/v5 v5.20.0
 	github.com/jodevsa/wireguard-operator v1.2.21-0.20240509203524-1d1bef4d0d82
 	github.com/kubernetes-csi/external-snapshotter/client/v8 v8.2.0
 	github.com/prometheus/prometheus v0.300.1