Update Stackless Python wiki URL (GH-8072)

It was moved from bitbucket to GitHub.
diff --git a/Doc/faq/design.rst b/Doc/faq/design.rst
index c2bf37a..5168121 100644
--- a/Doc/faq/design.rst
+++ b/Doc/faq/design.rst
@@ -348,7 +348,7 @@
 random moments.  Therefore, a complete threads implementation requires thread
 support for C.
 
-Answer 2: Fortunately, there is `Stackless Python <https://bitbucket.org/stackless-dev/stackless/wiki/Home>`_,
+Answer 2: Fortunately, there is `Stackless Python <https://github.com/stackless-dev/stackless/wiki>`_,
 which has a completely redesigned interpreter loop that avoids the C stack.