[gedit] docs: add C++ to the list of possible languages to write a plugin

[Sébastien Wilmet <swilmet src gnome org>]

commit 2918c45b3fbc0adb8ac76dcb902dce79b8b88fcf
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Oct 13 12:34:32 2020 +0200

    docs: add C++ to the list of possible languages to write a plugin
    
    Should be feasible, but it's a little going off the beaten tracks (the
    same for Rust, I guess).

 docs/how-to-write-a-gedit-plugin.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/docs/how-to-write-a-gedit-plugin.md b/docs/how-to-write-a-gedit-plugin.md
index 69e833e27..7e7e942f7 100644
--- a/docs/how-to-write-a-gedit-plugin.md
+++ b/docs/how-to-write-a-gedit-plugin.md
@@ -10,7 +10,7 @@ Programming language for a gedit plugin
 The preferred language is the C language, that way the code can be easily
 refactored to be included in a library.
 
-Rust and Vala plugins are possible too since they are equivalent to C.
+Rust, C++ and Vala plugins are possible too since they are equivalent to C.
 
 Python plugins are possible too.