adopt wiki URL (#5737)

Reviewed-on: #5737
Co-authored-by: Tobias Diekershoff <tobiasd@fsfe.org>
Co-committed-by: Tobias Diekershoff <tobiasd@fsfe.org>

fsfe.org/contribute/web/features.en.xhtml

@@ -51,8 +51,8 @@
     </p>
 
     <p>
-      First of all, when editing or creating websites, please make sure to <a href="https://wiki.fsfe.org/TechDocs/Mainpage/Editing#Enabling_Git_hooks">enable
-      the Git hooks</a> and follow <a href="https://wiki.fsfe.org/TechDocs/Mainpage/Editing/BestPractices">the
+      First of all, when editing or creating websites, please make sure to <a href="https://docs.fsfe.org/en/techdocs/mainpage/editing#enabling-git-hooks">enable
+      the Git hooks</a> and follow <a href="https://docs.fsfe.org/en/techdocs/mainpage/editing/bestpractices">the
       best practices</a>. They will mitigate a lot of common issues and make
       things more pleasant for you and others.
     </p>
@@ -67,7 +67,7 @@
 
     <p>
       Thirdly, also be aware of the more technical documentation of the features
-      <a href="https://wiki.fsfe.org/TechDocs/Mainpage/Editing">on the Editing
+      <a href="https://docs.fsfe.org/en/techdocs/mainpage/editing">on the Editing
       wiki page</a>. While the page you are currently looking at is rather meant
       for editors, the wiki page may be more helpful for our tech-savvy web
       developers.
@@ -77,7 +77,7 @@
     <h2 id="metadata">Meta data</h2>
 
     <p>
-      You can add various meta data and clever tags in your XHTML file. <a href="https://wiki.fsfe.org/TechDocs/Mainpage/Editing#Adding_meta_information">This
+      You can add various meta data and clever tags in your XHTML file. <a href="https://docs.fsfe.org/en/techdocs/mainpage/editing#adding-meta-information">This
       wiki page</a> shows all of them. In this article, we set multiple authors
       (see on top) and a description and image that are visible in social media
       and other pages.
@@ -301,7 +301,7 @@
     <p>
       Unfortunately, we currently cannot directly embed the video from Peertube
       directly. Therefore, we provide the <a href="https://git.fsfe.org/fsfe-system-hackers/peertube-embedder">Peertube
-      Embedder</a>, a script on our <a href="https://wiki.fsfe.org/TechDocs/DownloadServer">download server</a>
+      Embedder</a>, a script on our <a href="https://docs.fsfe.org/en/techdocs/downloadserver">download server</a>
       that automates the necessary processes of download and conversion. Please
       follow the tool's documentation to learn how to use it and how it works.
       There you will also find a list of drawbacks of this temporary solution.
@@ -658,7 +658,7 @@
     </aside>
 
     <p>
-      Small pitfall: if you <a href="https://wiki.fsfe.org/TechDocs/Mainpage/BuildLocally">build the
+      Small pitfall: if you <a href="https://docs.fsfe.org/en/techdocs/mainpage/buildlocally">build the
       website locally</a> and include a module in a page for the first time,
       you'll have to run <code>make</code> after including a module once.
     </p>