updated French translation

(cherry-picked from commit a32d689c46)

changelog.md

@@ -16,7 +16,7 @@
      (bug #2732)
    * Fixed "Search" placeholder text in dialog item filters not being
      translatable (bug #2709, bug #2732).
-   * Updated translations: British English, Chinese (Simplified),
+   * Updated translations: British English, Chinese (Simplified), French
      Scottish Gaelic, Spanish, Ukrainian
  ### WML engine
    * Support formula= key in [variable] ConditionalWML

players_changelog.md

@@ -4,7 +4,7 @@ changelog: https://github.com/wesnoth/wesnoth/blob/master/changelog.md
 
 ## Version 1.15.0-dev
  ### Language and i18n
-   * Updated translations: British English, Chinese (Simplified),
+   * Updated translations: British English, Chinese (Simplified), French,
      Scottish Gaelic, Spanish, Ukrainian.
  ### Miscellaneous and bug fixes
    * Fixed minimap buttons not doing anything (bug #2681)