chore(deps): update cilium images

Author: gardener-ci-robot

imagevector/images.yaml

@@ -2,7 +2,7 @@ images:
   - name: cilium-agent
     sourceRepository: github.com/cilium/cilium
     repository: quay.io/cilium/cilium
-    tag: v1.17.9
+    tag: v1.18.4
     labels:
     - name: 'gardener.cloud/cve-categorisation'
       value:
@@ -40,7 +40,7 @@ images:
   - name: cilium-operator
     sourceRepository: github.com/cilium/cilium
     repository: quay.io/cilium/operator
-    tag: v1.17.9
+    tag: v1.18.4
     labels:
     - name: 'gardener.cloud/cve-categorisation'
       value:
@@ -79,7 +79,7 @@ images:
   - name: hubble-relay
     sourceRepository: github.com/cilium/hubble-ui
     repository: quay.io/cilium/hubble-relay
-    tag: v1.17.9
+    tag: v1.18.4
     labels:
     - name: 'gardener.cloud/cve-categorisation'
       value:
@@ -92,7 +92,7 @@ images:
   - name: certgen
     sourceRepository: github.com/cilium/certgen
     repository: quay.io/cilium/certgen
-    tag: v0.2.4
+    tag: v0.3.1
     labels:
     - name: 'gardener.cloud/cve-categorisation'
       value: