doc: fix typo in plugin API reference

doc/en/weechat_plugin_api.en.txt

@@ -6810,7 +6810,7 @@ Arguments:
 * 'interval': interval between two calls (milliseconds, so 1000 = 1 second)
 * 'align_second': alignment on a second. For example, if current time is 09:00,
   if interval = 60000 (60 seconds), and align_second = 60, then timer is
-  called each minute when second is 00
+  called each minute when second is 0
 * 'max_calls': number of calls to timer (if 0, then timer has no end)
 * 'callback': function called when time is reached, arguments and return value:
 ** 'void *data': pointer

doc/fr/weechat_plugin_api.fr.txt

@@ -6902,7 +6902,7 @@ Paramètres :
   seconde)
 * 'align_second' : alignement sur la seconde. Par exemple, si la date courante
   est 09:00, si l'intervalle est 60000 (60 secondes), et que align_second = 60,
-  alors le timer sera appelé chaque minutes quand la seconde sera 00
+  alors le timer sera appelé chaque minute quand la seconde sera 0
 * 'max_calls' : nombre maximum d'appels au timer (si 0, le timer n'a pas de
   fin)
 * 'callback' : fonction appelée quand le délai est atteint, paramètres et valeur

doc/it/weechat_plugin_api.it.txt

@@ -6840,10 +6840,13 @@ struct t_hook *weechat_hook_timer (long interval,
 Argomenti:
 
 * 'interval': intervallo tra due chiamate (millisecondi, 1000 = 1 secondo)
+// TRANSLATION MISSING
 * 'align_second': allineamento su un secondo. Per esempio, rrent time is 09:00,
   if interval = 60000 (60 seconds), and align_second = 60, then timer is
-  called each minute when second is 00
+  called each minute when second is 0
+// TRANSLATION MISSING
 * 'max_calls': number of calls to timer (if 0, then timer has no end)
+// TRANSLATION MISSING
 * 'callback': function called when time is reached, argomenti e valore
   restituito:
 ** 'void *data': pointer