fix: update examples in metadata (#876)

Author: skywardboundd

standard/tokens/metadata.mdx

@@ -189,11 +189,11 @@ Read known attributes such as `uri`, `name`, `image`, `description`, and `image_
 
 Examples:
 
-On-chain NFT: [EQBq5z4N\_GeJyBdvNh4tPjMpSkA08p8vWyiAX6LNbr3aLjI0](https://getgems.io/collection/EQAVGhk_3rUA3ypZAZ1SkVGZIaDt7UdvwA4jsSGRKRo-MRDN/EQBq5z4N_GeJyBdvNh4tPjMpSkA08p8vWyiAX6LNbr3aLjI0)
+On-chain NFT: [`EQBq5z4N_GeJyBdvNh4tPjMpSkA08p8vWyiAX6LNbr3aLjI0`](https://tonviewer.com/EQBq5z4N_GeJyBdvNh4tPjMpSkA08p8vWyiAX6LNbr3aLjI0)
 
-Semi-chain NFT: [EQB2NJFK0H5OxJTgyQbej0fy5zuicZAXk2vFZEDrqbQ\_n5YW](https://getgems.io/nft/EQB2NJFK0H5OxJTgyQbej0fy5zuicZAXk2vFZEDrqbQ_n5YW)
+Semi-chain NFT: [`EQB2NJFK0H5OxJTgyQbej0fy5zuicZAXk2vFZEDrqbQ_n5YW`](https://tonviewer.com/EQB2NJFK0H5OxJTgyQbej0fy5zuicZAXk2vFZEDrqbQ_n5YW)
 
-On-chain jetton master: [EQA4pCk0yK-JCwFD4Nl5ZE4pmlg4DkK-1Ou4HAUQ6RObZNMi](https://tonscan.org/jetton/EQA4pCk0yK-JCwFD4Nl5ZE4pmlg4DkK-1Ou4HAUQ6RObZNMi)
+On-chain jetton master: [`EQCxE6mUtQJKFnGfaROTKOt1lZbDiiX1kCixRv7Nw2Id_sDs`](https://tonviewer.com/EQCxE6mUtQJKFnGfaROTKOt1lZbDiiX1kCixRv7Nw2Id_sDs)
 
 ## How to parse