Improve accuracy of attribute modification suggestions

[YusukeHirao]

Typographical error correction suggestions

Suggest the correct attribute name for non-existent attribute names such as nama, based on the element's attribute list.

Misunderstanding-based correction suggestions

For the video element, suggest preload instead of the unsupported attribute loading, based on the element's attribute list.

Inferences from other definitions #1480

Infer the intended value of the datetime attribute for a time element if incorrect, based on its content (e.g., <time datetime="2">AD 2</time> should correctly be "0002").