Share: Fix going from child note to parent share root

[gigamonster256]

navigating from a sub note to the parent note when the parent note is the root note is broken due to the missing relative path specifier

href for the parent node if it is the root node is "" instead of "./" see the differing behavior of referencing child nodes

Notes/src/views/share/page.ejs

Lines 66 to 69 in b2e1a3e

	for (const childNote of note.getVisibleChildNotes()) {
	const isExternalLink = childNote.hasLabel('shareExternalLink');
	const linkHref = isExternalLink ? childNote.getLabelValue('shareExternalLink') : `./${childNote.shareId}`;
	const target = isExternalLink ? `target="_blank" rel="noopener noreferrer"` : '';

vs the parent node

Notes/src/views/share/page.ejs

Lines 38 to 40 in b2e1a3e

	<% if (note.parents[0].noteId !== '_share' && note.parents.length !== 0) { %>
	<nav id="parentLink">
	<%= t("share_page.parent") %> <a href="<%= note.parents[0].shareId %>"

[eliandoran]

@gigamonster256 , thank you for your contribution!