doc/api: Remove unnecessary cast in Python example

The highlight argument is already an int, so no point in casting it.

doc/en/weechat_plugin_api.en.adoc

@@ -10437,7 +10437,7 @@ def hook_print(buffer: str, tags: str, message: str, strip_colors: int, callback
 
 # example
 def my_print_cb(data: str, buffer: str, date: str, tags: str, displayed: int, highlight: int, prefix: str, message: str) -> int:
-    if int(highlight):
+    if highlight:
         # ...
     return weechat.WEECHAT_RC_OK
 

doc/fr/weechat_plugin_api.fr.adoc

@@ -10643,7 +10643,7 @@ def hook_print(buffer: str, tags: str, message: str, strip_colors: int, callback
 
 # exemple
 def my_print_cb(data: str, buffer: str, date: str, tags: str, displayed: int, highlight: int, prefix: str, message: str) -> int:
-    if int(highlight):
+    if highlight:
         # ...
     return weechat.WEECHAT_RC_OK
 

doc/it/weechat_plugin_api.it.adoc

@@ -10775,7 +10775,7 @@ def hook_print(buffer: str, tags: str, message: str, strip_colors: int, callback
 
 # esempio
 def my_print_cb(data: str, buffer: str, date: str, tags: str, displayed: int, highlight: int, prefix: str, message: str) -> int:
-    if int(highlight):
+    if highlight:
         # ...
     return weechat.WEECHAT_RC_OK
 

doc/ja/weechat_plugin_api.ja.adoc

@@ -10484,7 +10484,7 @@ def hook_print(buffer: str, tags: str, message: str, strip_colors: int, callback
 
 # 例
 def my_print_cb(data: str, buffer: str, date: str, tags: str, displayed: int, highlight: int, prefix: str, message: str) -> int:
-    if int(highlight):
+    if highlight:
         # ...
     return weechat.WEECHAT_RC_OK
 

doc/sr/weechat_plugin_api.sr.adoc

@@ -10079,7 +10079,7 @@ def hook_print(buffer: str, tags: str, message: str, strip_colors: int, callback
 
 # пример
 def my_print_cb(data: str, buffer: str, date: str, tags: str, displayed: int, highlight: int, prefix: str, message: str) -> int:
-    if int(highlight):
+    if highlight:
         # ...
     return weechat.WEECHAT_RC_OK