docs: first pass at 404s

Author: nuke-web3

how-to-guides/arabica-devnet.md

@@ -175,7 +175,6 @@ There are multiple explorers you can use for Arabica:
 
 - [https://arabica.celenium.io](https://arabica.celenium.io)
 - [https://explorer.celestia-arabica-11.com](https://explorer.celestia-arabica-11.com)
-- [https://celestiascan.com](https://celestiascan.com)
 
 ## Network upgrades
 

how-to-guides/mainnet.md

@@ -283,7 +283,6 @@ There are multiple explorers you can use for Mainnet Beta:
 
 - [https://celenium.io](https://celenium.io)
 - [https://celestia.explorers.guru](https://celestia.explorers.guru)
-- [https://explorer.modular.cloud/celestia-mainnet](https://explorer.modular.cloud/celestia-mainnet)
 - [https://mintscan.io/celestia](https://mintscan.io/celestia)
 - [https://explorer.nodestake.top/celestia](https://explorer.nodestake.top/celestia)
 - [https://stakeflow.io/celestia](https://stakeflow.io/celestia)

how-to-guides/mocha-testnet.md

@@ -232,7 +232,6 @@ The following websites provide analytics for Mocha Testnet:
 There are several explorers you can use for Mocha:
 
 - [https://testnet.mintscan.io/celestia-testnet](https://testnet.mintscan.io/celestia-testnet)
-- [https://celestiascan.com](https://celestiascan.com)
 - [https://mocha.celenium.io](https://mocha.celenium.io)
 - [https://explorer.nodestake.top/celestia-testnet/](https://explorer.nodestake.top/celestia-testnet)
 - [https://stakeflow.io/celestia-testnet](https://stakeflow.io/celestia-testnet)

how-to-guides/sp1-blobstream-deploy.md

@@ -26,7 +26,7 @@ cd sp1-blobstream
 [sp1-blobstream README](https://github.com/succinctlabs/sp1-blobstream?tab=readme-ov-file#deployment).
 
 3. If you're deploying on a chain where there isn't a canonical verifier listed in the
-[SP1 contract addresses](https://github.com/succinctlabs/sp1/blob/main/book/onchain-verification/contract-addresses.md), you'll need to:
+[SP1 contract addresses](https://github.com/succinctlabs/sp1/blob/main/book/verification/onchain/contract-addresses.md), you'll need to:
 
    a. Deploy your own SP1 Verifier from the [sp1-contracts](https://github.com/succinctlabs/sp1-contracts) matching your `sp1-sdk` version.
    b. Set the `SP1_VERIFIER_ADDRESS` in your `.env` file to the address of your deployed verifier.