updated version

Author: krofax

pages/builders/chain-operators/features/alt-da-mode.mdx

@@ -23,9 +23,9 @@ An Alt-DA Mode OP Stack chain enables a chain operator to post and read data to
 
 You should use at least the following compatible op\* versions when running your chain.
 
-*   op-node/v1.8.0-rc.1
-*   op-proposer/v1.8.0-rc.1
-*   op-batcher/v1.8.0-rc.1
+*   op-node/v1.9.1
+*   op-proposer/v1.9.1
+*   op-batcher/v1.9.1
 *   [Latest version of op-geth](https://github.com/ethereum-optimism/op-geth/releases/latest)
 *   For deploying your contracts, use [OP Stack v1.9.1](https://github.com/ethereum-optimism/optimism/releases/tag/v1.9.1) or later