Update credits

Author: vkbo

CREDITS.md

@@ -39,6 +39,10 @@ Additional larger translation contributions:
 * **French:** Albert Aribaud (aaribaud)
 * **Portuguese:** Oli Maia (olimaia)
 
+Translations of the documentation:
+
+* **French:** Jean-Michel Heras (Karduin)
+
 Translations are managed on [Crowdin](https://crowdin.com/project/novelwriter), and more
 contributions are listed on the project's Members page.
 

novelwriter/assets/text/credits_en.htm

@@ -47,6 +47,12 @@ <h3>Translations</h3>
   <li><b>Portuguese:</b> Oli Maia (olimaia)</li>
 </ul>
 
+<p>Translations of the documentation:</p>
+
+<ul>
+  <li><b>French:</b> Jean-Michel Heras (Karduin)</li>
+</ul>
+
 <p>Translations are managed on <a href="https://crowdin.com/project/novelwriter">Crowdin</a>, and
 more contributions are listed on the project's Members page.</p>