chore: rename CollateralCurrrencies in docs

Author: rflechtner

pallets/pallet-bonded-coins/README.md

@@ -92,7 +92,7 @@ The `Config` trait defines the configuration parameters and associated types req
                            Signed operations are still necessary for some transcendental functions in the bonding curves. 
                            Therefore, the input parameters are used to take unsigned parameters and translate them to the signed equivalent.
 - `Fungibles`: Implementation of creating and managing new bonded fungibles.
-- `CollateralCurrencies`: Implementation to withdraw and deposit collateral currencies.
+- `Collaterals`: Implementation to withdraw and deposit collateral currencies.
 
 ### Constants