footer: add link to opencollective donation

ikiwiki/pagespec/attachment.fr/index.html

@@ -213,6 +213,7 @@ msgstr "`virusfree()` - teste la pièce jointe avec un programme antivirus."
 
 		<ul>
 		<li><a href="../../../join/index.en.html">Become a member</a>
+		<li><a href="https://opencollective.com/ilot">Donate</a></li>
 		<li><a href="https://forge.ilot.io/ilot/-/projects">Git Forge</a></li>
 		<li><a href="https://wiki.ilot.io">Wiki</a></li>
 		</ul>

ikiwiki/pagespec/attachment/index.html

@@ -129,6 +129,7 @@ include a glob in the type, for example <code>mimetype(image/*)</code>.</p></li>
 
 		<ul>
 		<li><a href="../../../join/index.en.html">Become a member</a>
+		<li><a href="https://opencollective.com/ilot">Donate</a></li>
 		<li><a href="https://forge.ilot.io/ilot/-/projects">Git Forge</a></li>
 		<li><a href="https://wiki.ilot.io">Wiki</a></li>
 		</ul>

ikiwiki/pagespec/index.html

@@ -194,6 +194,7 @@ linking to the page containing the PageSpec.</p>
 
 		<ul>
 		<li><a href="../../join/index.en.html">Become a member</a>
+		<li><a href="https://opencollective.com/ilot">Donate</a></li>
 		<li><a href="https://forge.ilot.io/ilot/-/projects">Git Forge</a></li>
 		<li><a href="https://wiki.ilot.io">Wiki</a></li>
 		</ul>

ikiwiki/pagespec/po.fr/index.html

@@ -166,6 +166,7 @@ msgstr ""
 
 		<ul>
 		<li><a href="../../../join/index.en.html">Become a member</a>
+		<li><a href="https://opencollective.com/ilot">Donate</a></li>
 		<li><a href="https://forge.ilot.io/ilot/-/projects">Git Forge</a></li>
 		<li><a href="https://wiki.ilot.io">Wiki</a></li>
 		</ul>

ikiwiki/pagespec/po/index.html

@@ -116,6 +116,7 @@ translated.</li>
 
 		<ul>
 		<li><a href="../../../join/index.en.html">Become a member</a>
+		<li><a href="https://opencollective.com/ilot">Donate</a></li>
 		<li><a href="https://forge.ilot.io/ilot/-/projects">Git Forge</a></li>
 		<li><a href="https://wiki.ilot.io">Wiki</a></li>
 		</ul>

ikiwiki/pagespec/sorting/index.html

@@ -114,6 +114,7 @@ title in reverse order if two pages have the same age).</p>
 
 		<ul>
 		<li><a href="../../../join/index.en.html">Become a member</a>
+		<li><a href="https://opencollective.com/ilot">Donate</a></li>
 		<li><a href="https://forge.ilot.io/ilot/-/projects">Git Forge</a></li>
 		<li><a href="https://wiki.ilot.io">Wiki</a></li>
 		</ul>