fix(deps): update dependency html-validate to v7.7.0

This MR contains the following updates:

Package	Type	Update	Change
html-validate (source)	dependencies	minor	7.6.0 -> 7.7.0

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Release Notes

html-validate/html-validate

v7.7.0

Compare Source

Features

• html5: validates <a target> and <area target> for valid keywords (6fa0bd9)
• new defineMetadata helper for writing custom element metadata (6a06811), closes #​186
• rules: new rule area-alt (3c1f0b3), closes #​178
• rules: new rule attribute-misuse (07a0bbe), closes #​181

Bug Fixes

• html5: <map> requires name attribute (6104eb3)
• html5: <meta charset> should only allow utf-8 (aaa15fe)
• html5: disallow <area coords> when shape is default (76115f2), closes #​183
• html5: mark <keygen> as deprecated (859402d)
• html5: require <area coords> when shape is requires is (ed750c1), closes #​182

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