ci(lesavka): lower jnlp sidecar reservation

Jenkinsfile

@@ -73,6 +73,15 @@ spec:
       volumeMounts:
         - name: workspace-volume
           mountPath: /home/jenkins/agent
+    - name: jnlp
+      image: jenkins/inbound-agent:3355.v388858a_47b_33-3-jdk21
+      resources:
+        requests:
+          cpu: "5m"
+          memory: "128Mi"
+        limits:
+          cpu: "500m"
+          memory: "1Gi"
 """
     }
   }