Update arbitrum-integration.md (#1387)

* Update arbitrum-integration.md

change in fall back on method to ability
change in link to sequencer_inbox.go

* fix: use v2.2.2 release link

* Update developers/arbitrum-integration.md

---------

Co-authored-by: jcstein <[email protected]>
Co-authored-by: Josh Stein <[email protected]>

developers/arbitrum-integration.md

@@ -51,13 +51,13 @@ which relays commitments to Celestia’s data root to an onchain light client
 on Ethereum. This allows L2 solutions that settle on Ethereum to benefit
 from the scalability Celestia’s data availability layer can provide.
 
-As part of this integration, Blobstream has been incorporated into the
+As part of this integration, Blobstream is being called from the
 Arbitrum `SequencerInbox.sol` contract.
 
 In the `SequencerInbox.sol` contract, the `validateBatchData`
 modifier has been designed to authenticate that the data root is
 on Celestia when reading a batch of data. This is achieved by the
-[following code by @Ferret-san](https://gist.github.com/Ferret-san/3d3fc1b5738ee8d77ad112c0eb8bbe5f):
+[following code in `arbnode/sequencer_inbox.go`](https://github.com/celestiaorg/nitro-contracts/blob/celestia/blobstream/src/bridge/SequencerInbox.sol#L334-L360):
 
 Note that the data above is the bytes serialized version of this struct in Go:
 
@@ -101,8 +101,8 @@ The [@celestiaorg/nitro](https://github.com/celestiaorg/nitro) integration
 [uses the same fallback mechanism](https://github.com/celestiaorg/nitro/blob/f01968eb3d4e19329e9c92b050e98a8e5772f1f2/arbnode/batch_poster.go#L845-L857).
 
 The fallback logic for Celestia DA is configurable, providing an alternative
-to the previous default fallback mechanism. Additionally, a method has been
-added to the Arbitrum node software. This method allows the sequencer to call
+to the previous default fallback mechanism. Additionally, an ability has been
+added to the Arbitrum node software which allows the sequencer to call
 `VerifyAttestation` to check if a data root has been posted on Blobstream or
 not, before it sends the sequencer message (data pointer) to the underlying
 chain.