chore: update op-batcher command

Author: rac-sri

pages/docs/build-with-avail/Optimium/op-stack/op-stack.mdx

@@ -512,19 +512,19 @@ To optimize synchronization and avoid network resource waste:
 ```bash
 cd ~/optimism-plasma-avail/op-batcher
 ./bin/op-batcher \
-  --l2-eth-rpc=http://localhost:9545 \
-  --rollup-rpc=http://localhost:9547 \
-  --poll-interval=10s \
+  --l2-eth-rpc=http://localhost:8545 \
+  --rollup-rpc=http://localhost:8547 \
+  --poll-interval=1s \
   --sub-safety-margin=6 \
   --num-confirmations=1 \
   --safe-abort-nonce-too-low-count=3 \
   --resubmission-timeout=30s \
   --rpc.addr=0.0.0.0 \
-  --rpc.port=9548 \
+  --rpc.port=8548 \
   --rpc.enable-admin \
-  --max-channel-duration=5 \
-  --l1-eth-rpc=$L1_RPC \
-  --private-key=$BATCHER_KEY \
+  --max-channel-duration=1 \
+  --l1-eth-rpc=$L1_RPC_URL \
+  --private-key=$GS_BATCHER_PRIVATE_KEY
   --plasma.enabled=true \
   --plasma.da-server=<DA_SERVER_HTTP_URL>
 ```