minor fixes in staking

Author: LandauRaz

modules/architecture/pages/staking.adoc

@@ -145,7 +145,7 @@ Staking rewards are issued in newly minted STRK tokens, based on a minting curve
 
 [stem]
 ++++
-M = \frac{\hat{C}}{10} \cdot \sqrt{\sigma}
+M = \frac{\hat{C}}{10 \cdot \sqrt{\sigma}}
 ++++
 
 where:
@@ -321,7 +321,7 @@ a| * `amount` should be denominated in the token's base unit (e.g., FRI for STRK
 | Adding to a delegation pool
 | Invoke the delegation pool contract's https://github.com/starkware-libs/starknet-staking/blob/main/docs/spec.md#add_to_delegation_pool[`add_to_delegation_pool`^] function
 a| * Adding to a delegation pool is only possible after entering it using `enter_delegation_pool`
-* `amount` should be denominated in FRI (i.e., 1×10^18^ = 1 STRK)
+* `amount` should be denominated in the token's base unit (e.g., FRI for STRK)
 * You must first approve the transfer of STRK tokens to the delegation pool contract by invoking the STRK contract’s `approve` function
 
 | Switching delegation pools