Issue #23406: Clarify documentation on multiplying a sequence

Patch from Matheus Vieira Portela.
diff --git a/Doc/faq/programming.rst b/Doc/faq/programming.rst
index 23891be..135ae52 100644
--- a/Doc/faq/programming.rst
+++ b/Doc/faq/programming.rst
@@ -1280,6 +1280,8 @@
 usually a lot slower than using Python lists.
 
 
+.. _faq-multidimensional-list:
+
 How do I create a multidimensional list?
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