fix(docs): clarify minting tag reservation process in IMintingTagManager documentation

Author: fassko

docs/fassets/reference/IMintingTagManager.mdx

@@ -13,8 +13,8 @@ To get the minting tag manager address, use the [getMintingTagManager](/fassets/
 
 ### `reserve`
 
-Reserve a new minting tag by paying the reservation fee.
-The caller becomes the owner of the tag and the initial minting recipient.
+Reserve a new minting tag NFT by paying the reservation fee.
+The caller becomes the owner of this NFT (tag ID) and the initial minting recipient.
 
 ```solidity
 function reserve() external payable returns (uint256);