Fix constructor details to show description instead of brief in Javadoc

[dmitrysulman]

When generating Javadoc, the Constructor Detail section displays only the brief constructor description (i.e., the first sentence) instead of the full description. See line 252 in class.korte:

dokka/dokka-subprojects/plugin-javadoc/src/main/resources/views/class.korte

Lines 245 to 264 in 540fe08

	<h3>Constructor Detail</h3>
	{% for constructor in constructors %}
	<a name="{{ constructor.anchorLink }}"></a>
	<ul class="blockList">
	<li class="blockList">
	<h4>{{ constructor.name }}</h4>
	<pre>{{ constructor.name }}({{ constructor.inlineParameters|raw }})</pre>
	<div class="block">{{ constructor.brief|raw}}</div>
	{% if constructor.parameters.size != 0 && hasAnyDescription(constructor.parameters) %}
	<dl>
	<dt><span class="paramLabel">Parameters:</span></dt>
	{% for parameter in constructor.parameters %}
	{% if parameter.description != "" %}
	<dd><code>{{ parameter.name }}</code> - {{ parameter.description|raw }}</dd>
	{% endif %}
	{% endfor %}
	</dl>
	{% endif %}
	</li>
	</ul>

A similar issue for method details was fixed long time ago in version 1.4.0.

This PR fixes the issue by replacing constructor.brief with constructor.description.