Update acknowledgements https links

[jodygarnett]

No description provided.

[josegar74]

@jodygarnett this file also needs to be updated:

website/docsrc/_theme/geonetwork/layout.html

Lines 290 to 301 in 6c11cd4

	<a href="http://camptocamp.com" alt="Camptocamp - Innovative Solutions by Open Source Experts" target="_blank">
	Camptocamp
	<!-- <img src="{{ pathto('_static/camptocamp.svg', 1) }}" width="135px" /> -->
	</a>
	<a href="http://geocat.net" alt="GeoCat bv - Government Geographic Data Publishing" class="contrast" target="_blank">
	GeoCat
	<!-- <img src="{{ pathto('_static/geocat-logo.png', 1) }}" width="150" /> -->
	</a>
	<a href="http://titellus.net" alt="titellus" target="_blank">
	Titellus
	<!-- <img src="{{ pathto('_static/titellus.png', 1) }}" width="135px" /> -->
	</a>