Update op-stack-on-0g-da.md

added space

docs/build-with-0g/rollups-and-appchains/op-stack-on-0g-da.md

@@ -27,10 +27,10 @@ Find the repository for this integration at [https://github.com/0glabs/0g-da-op-
 * Set up a [0G DA encoder node]('../build-with-0g/da-integration').
 * [0G 0P stack rollup kit](https://github.com/0glabs/0g-da-op-plasma)
 
-Refer here for more comprehensive guide:[run OP Stack with 0G DA](https://github.com/0glabs/0g-da-op-plasma/blob/main/OP%20Stack%20integration.md)
+Refer here for more comprehensive guide: [run OP Stack with 0G DA](https://github.com/0glabs/0g-da-op-plasma/blob/main/OP%20Stack%20integration.md)
 
 **Important Notes:**
 
 * This is a beta integration, and active development is ongoing.
 * Ensure all necessary ports are open in your firewall configuration.
-* Refer to the [Optimism documentation](https://docs.optimism.io/) for additional configuration options and troubleshooting.
+* Refer to the [Optimism documentation](https://docs.optimism.io/) for additional configuration options and troubleshooting.