Update nft-minting.md to fix formatting (#486)

Apologies for another commit onto an patch that was already merged. I noticed that there was a formatting issue at the bottom due to a missing space. I just fixed it. 

Please merge this as well. Thanks once again

apps/base-docs/docs/tools/nft-minting.md

@@ -33,4 +33,5 @@ keywords:
 [Crossmint](https://crossmint.com/?utm_source=backlinks&utm_medium=docs&utm_campaign=base) provides [APIs](https://docs.crossmint.com/minting/quickstart/?utm_source=backlinks&utm_medium=docs&utm_campaign=base) that allow you to create NFT Collections, mint NFTs and airdrop it to your users. Please read this [step-by-step guide](https://blog.crossmint.com/create-and-mint-nfts-on-base/?utm_source=backlinks&utm_medium=docs&utm_campaign=base) that teaches you how to create and mint NFTs on Base.
 
 You can also create NFT Collections and mint NFTs with no-code. First, proceed to [Crossmint's Console](https://www.crossmint.com/signin?callbackUrl=/console/overview/?utm_source=backlinks&utm_medium=docs&utm_campaign=base) and create an account. Then, refer to this [guide](https://blog.crossmint.com/how-to-create-and-mint-nfts-with-no-code/?utm_source=backlinks&utm_medium=docs&utm_campaign=base) to learn how you can create NFT Collections and mint NFTs on the Base network with no-code using Crossmint.
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