[gtk-web/issue-88: 3/5] cpp: Update links

[Emmanuele Bassi <ebassi src gnome org>]

commit 4780fb50dda8eebbc43538c69e748f2a4b081033
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Dec 5 13:44:32 2021 +0000

    cpp: Update links
    
    Use developer-old.gnome.org until we find a new home for the gtkmm
    documentation.

 _docs/language-bindings/cpp.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/_docs/language-bindings/cpp.md b/_docs/language-bindings/cpp.md
index 7f1238f..3524167 100644
--- a/_docs/language-bindings/cpp.md
+++ b/_docs/language-bindings/cpp.md
@@ -120,12 +120,12 @@ After compiling and run the above code and you should see get the below given ou
 This code depicts how to use GTK C++ binding for creating a simple Hello
 World application. A more detailed explanation of the above code can be
 checked out
-[here](https://developer.gnome.org/gtkmm-tutorial/stable/sec-helloworld.html.en).
+[here](https://developer-old.gnome.org/gtkmm-tutorial/stable/sec-helloworld.html.en).
 
 ## Tutorials
 
 You can find various useful tutorials regarding gtkmm from this
-[source](https://developer.gnome.org/gtkmm-tutorial/stable/index.html).
+[source](https://developer-old.gnome.org/gtkmm-tutorial/stable/index.html).
 
 ## Contribute