`ImportDeclSyntax` incorrectly state no modifiers are supported by Swift

[Brett-Best]

ImportDeclSyntax incorrectly state no modifiers are supported by Swift

This is incorrect, a single access level modifier is allowed when either or both:

• Experimental Feature AccessLevelOnImport is enabled
• Upcoming Feature InternalImportsByDefault is enabled

swift-syntax/Sources/SwiftSyntax/generated/syntaxNodes/SyntaxNodesGHI.swift

Lines 3071 to 3079 in 606e0e7

	/// Modifiers that are attached to the import declaration. Currently, no modifiers are supported by Swift.
	public var modifiers: DeclModifierListSyntax {
	get {
	return Syntax(self).child(at: 3)!.cast(DeclModifierListSyntax.self)
	}
	set(value) {
	self = Syntax(self).replacingChild(at: 3, with: Syntax(value), rawAllocationArena: RawSyntaxArena()).cast(ImportDeclSyntax.self)
	}
	}

[ahoppen]

Thanks for noticing and reporting. Fixing this in #3214.