Update NFT spec with dynamic data.

[dzmitryhil]

Description

Update NFT spec with dynamic data.

Reviewers checklist:

• Try to write more meaningful comments with clear actions to be taken.
• Nit-picking should be unblocking. Focus on core issues.

Authors checklist

• Provide a concise and meaningful description
• Review the code yourself first, before making the PR.
• Annotate your PR in places that require explanation.
• Think and try to split the PR to smaller PR if it is big.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.06%. Comparing base (995c66c) to head (8ad5b01).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #831   +/-   ##
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  Coverage   37.06%   37.06%           
=======================================
  Files         182      182           
  Lines       52722    52722           
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  Hits        19544    19544           
  Misses      29640    29640           
  Partials     3538     3538           

Flag	Coverage Δ
coreum	32.95% <ø> (ø)
coreum-integration-tests-modules	23.81% <ø> (+0.02%)	⬆️

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[masihyeganeh]

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68, @wojtek-coreum, and @ysv)

[miladz68]

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @dzmitryhil, @wojtek-coreum, and @ysv)

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x/asset/nft/spec/README.md line 39 at r1 (raw file):

### Minting
The minting is enabled for all issued NFT classes. The minting allows to mint a token for an NFT class by the issuer of the class.
There are two types that can be used for NFT minting `DataBytes` and `DataDynamic`. The `DataBytes` contains immutable data bytes

there are two data types.

Code quote:

There are two types

[dzmitryhil]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @miladz68, @wojtek-coreum, and @ysv)

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x/asset/nft/spec/README.md line 39 at r1 (raw file):

Previously, miladz68 (milad) wrote…

there are two data types.

Done.

[masihyeganeh]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @miladz68, @wojtek-coreum, and @ysv)

[wojtek-coreum]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @miladz68 and @ysv)

[miladz68]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)