Written lesson cleanup: NFTs

[gin]

• Fix formatting by removing HTML tags
• Remove non-existent image in written lesson's section 10 For /foundry-nfts/9-testnet-demo/testnet1.png on line 137 it appears that it does not exist. I checked the extensions, and the static asset directory: https://updraft.cyfrin.io/foundry-nfts/9-testnet-demo/testnet.PNG https://updraft.cyfrin.io/foundry-nfts/9-testnet-demo/testnet.png https://github.com/Cyfrin/Updraft/tree/main/static/foundry-nfts/9-testnet-demo Removing might be okay because the written lesson still flows and doesn't appear to have essential information getting lost.

[Equious]

I suspect it was intended to be this image. Did you want to adjust the PR to include it?

[gin]

@Equious Thanks! Updated to use https://updraft.cyfrin.io/foundry-nfts/9-testnet-demo/testnet-demo1.png in commit 67dbe91

[gin]

Add commit with just typos and formatting fix (commit 8fa8f70)