Add Allnodes snapshots

These snapshots are updated every few days, not once a year.

Author: 3eph1r0th

pages/builders/node-operators/management/snapshots.mdx

@@ -35,8 +35,8 @@ Migrated OP Mainnet databases can be generated manually or pre-migrated database
 ### OP Mainnet (Full Node)
 
 <Callout type="info">
-  [Fastnode.io](https://fastnode.io/) provides more recent full node snapshots for OP Mainnet. You can find them [here](https://datapoint.fastnode.io/).
-  **Please note:** FastNode.io is a 3rd party provider, and the Optimism Foundation hasn't verified the snapshots.
+  [Allnodes](https://www.allnodes.com) provides more recent full node snapshots for OP Mainnet and Testnet. You can find them [here](https://www.publicnode.com/snapshots#optimism).
+  **Please note:** Allnodes is a 3rd party provider, and the Optimism Foundation hasn't verified the snapshots.
 </Callout>
 
 | Snapshot Date | Size  | Download Link                                                                                                                                                                                                                                             | sha256sum                                                                                          |