Update json-rpc.mdx

quick fix: this method doesn't need params

Author: sbvegan

pages/builders/node-operators/json-rpc.mdx

@@ -973,13 +973,13 @@ TODO: add description
   <Tabs.Tab>
     ```sh
     curl -X POST -H "Content-Type: application/json" --data \
-        '{"jsonrpc":"2.0","method":"admin_sequencerActive","params":[todo],"id":1}' \
+        '{"jsonrpc":"2.0","method":"admin_sequencerActive","params":[],"id":1}' \
         http://localhost:9545
     ```
   </Tabs.Tab>
   <Tabs.Tab>
     ```sh
-    cast rpc admin_sequencerActive [todo: add paramater options] --rpc-url http://localhost:9545
+    cast rpc admin_sequencerActive [] --rpc-url http://localhost:9545
     ```
   </Tabs.Tab>
 </Tabs>