docs(framework): regenerate fungible_asset doc

[apenzk]

Description

Regenerates fungible_asset.md to include the entry for is_asset_type_dispatchable. The function was added by #333 but the auto-generated doc was not refreshed at that time, so the file has been showing as dirty in working trees on every cargo build of aptos-cached-packages (which re-runs the framework release-builder via build.rs). Landing the regen here clears that dirty state for everyone.

How Has This Been Tested?

• This diff is the output of cargo clean -p aptos-cached-packages && cargo build -p aptos-cached-packages on m1.

Type of Change

• New feature
• Bug fix
• Breaking change
• Performance improvement
• Refactoring
• Dependency update
• Documentation update
• Tests

Which Components or Systems Does This Change Impact?

• Validator Node
• Full Node (API, Indexer, etc.)
• Move/Aptos Virtual Machine
• Aptos Framework
• Aptos CLI/SDK
• Developer Infrastructure
• Move Compiler
• Other (specify)

Checklist

• I have read and followed the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I identified and added all stakeholders and component owners affected by this change as reviewers
• I tested both happy and unhappy path of the functionality
• I have made corresponding changes to the documentation