Getting Icelandic docs translated for real this time

docs/is_IS.UTF-8/html/ENVVARS.html

@@ -17,16 +17,16 @@
             width="205"
             height="210"
             alt="Tux Paint"><br>
-        útgáfa 0.9.31<br/>
+        version 0.9.31<br/>
         Environment Variables Documentation      </h1>
 
       <p>
-        Höfundarréttur &copy; 2021-2023 eftir various contributors; sjá <a href="../../AUTHORS.txt">AUTHORS-skrá</a>.<br>
+        Copyright &copy; 2021-2023 by various contributors; see <a href="../../AUTHORS.txt">AUTHORS.txt</a>.<br>
         <a href="https://tuxpaint.org/">https://tuxpaint.org/</a>
       </p>
 
       <p>
-         5. maí 2023      </p>
+        maí  5, 2023      </p>
     </center>
 
     <hr>