Spelling fix

Author: Jim Pick

src/tutorials/0007-verifying-storage-on-filecoin/01.md

@@ -7,7 +7,7 @@
 
 In our [Decentralized Data Structures](https://proto.school/#/data-structures) tutorial, we explored how content addressing enable us to trust peers on the decentralized web. The concepts of content addressing and Content Identifiers (CIDs) are key to understanding how Filecoin verifies storage, so please go check out that tutorial now if you haven't yet done so.
 
-On a decentralized, peer-to-peer network like IPFS, we can use crytograhic hashing to confirm that any number of peers are storing exact copies of our data. However, we're depending on the generosity of those parties and have no guarantee that our data will continue to be replicated over time. Filecoin, on the other hand, adds an incentive layer to promote long term, verifiable storage on the decentralized web.
+On a decentralized, peer-to-peer network like IPFS, we can use cryptographic hashing to confirm that any number of peers are storing exact copies of our data. However, we're depending on the generosity of those parties and have no guarantee that our data will continue to be replicated over time. Filecoin, on the other hand, adds an incentive layer to promote long term, verifiable storage on the decentralized web.
 
 ## Incentivized storage