docs: update celestia-da for changes on GM (#438)

* docs: update celestia-da for changes on GM

1. Now that GM tutorial uses Kurtosis, Ignite is not installed once someone goes through GM tutorial. This PR updates the prerequisites so that the user installs the correct version of ignite. I hit issues #421 (comment) when installing newer version from ignite's site on this tutorial. 
2. Adds the `--rollkit.da_address` flag and explains what it is so that user can communicate with default light node setup easily.

* docs: fix da address code block

Author: jcstein

tutorials/celestia-da.md

@@ -25,8 +25,9 @@ After successfully starting a light node, it's time to start posting the batches
 
 ## 🏗️ Prerequisites {#prerequisites}
 
-From the [GM world rollup](/tutorials/gm-world) tutorial, you should already have the `rollkit` CLI and `ignite` CLI installed.
-
+* `rollkit` CLI installed from the [GM world rollup](/tutorials/gm-world) tutorial.
+* `ignite` CLI v28.4.0 installed `curl https://get.ignite.com/cli@v28.4.0! | bash`
+ 
 ## 🏗️ Building your sovereign rollup {#building-your-sovereign-rollup}
 
 Remove the existing `gm` project and create a new one using ignite:
@@ -126,7 +127,7 @@ The output of the command above will look similar to this:
  Your DA AUTH_TOKEN is eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJBbGxvdyI6WyJwdWJsaWMiLCJyZWFkIiwid3JpdGUiXX0.cSrJjpfUdTNFtzGho69V0D_8kyECn9Mzv8ghJSpKRDE
 ```
 
-Lastly, let's set up the namespace to be used for posting data on Celestia:
+Next, let's set up the namespace to be used for posting data on Celestia:
 
 ```bash
 DA_NAMESPACE=00000000000000000000000000000000000000000008e5f679bf7116cb
@@ -144,6 +145,13 @@ Replace the last 20 characters (10 bytes) in `0000000000000000000000000000000000
 [Learn more about namespaces](https://docs.celestia.org/developers/node-tutorial#namespaces).
 :::
 
+Lastly, set your DA address for your light node, which by default runs at
+port 26658:
+
+```bash
+DA_ADDRESS=http://localhost:26658
+```
+
 ## 🔥 Running your rollup connected to Celestia light node
 
 Finally, let's initiate the rollup node with all the flags:
@@ -154,6 +162,7 @@ rollkit start \
     --rollkit.da_auth_token $AUTH_TOKEN \
     --rollkit.da_namespace $DA_NAMESPACE \
     --rollkit.da_start_height $DA_BLOCK_HEIGHT \
+    --rollkit.da_address $DA_ADDRESS \
     --minimum-gas-prices="0.025stake"
 ```