fix erorr stake.adoc (#1650)

Author: eeemmmmmm

components/Starknet/modules/guides/pages/staking-on-starknet/stake.adoc

@@ -79,7 +79,7 @@ The `stake` function does the following:
 . Records your details in the staking contract
 . Locks the specified amount of STRK tokens into the staking contract
 . Deploys a new delegation pool contract associated with you (if pooling is enabled)
-. Begins accumalating your rewards
+. Begins accumulating your rewards
 
 == Verifying stakes