Fix typo in footer

The word 'Mise' must be consistent with the word 'version'

web/include/footer.php

@@ -4,7 +4,7 @@
             Version
             <?php include ("generated/version.txt"); ?>
             -
-            Mis en ligne le
+            Mise en ligne le
             <?php include("generated/date.txt"); ?>
             -
             <a href="/public/credit.php">