gh-133641: Doc: Add missing source link in ``concurrent.futures`` (#133642)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

diff --git a/Doc/library/concurrent.futures.rst b/Doc/library/concurrent.futures.rst
index 7efae9e628b82865abb21d9633f82d6146611591..3c8d9ab111e09e1658aeece39de1d079b94ca006 100644 (file)
--- a/Doc/library/concurrent.futures.rst
+++ b/Doc/library/concurrent.futures.rst
@@ -6,8 +6,9 @@
 
 .. versionadded:: 3.2
 
-**Source code:** :source:`Lib/concurrent/futures/thread.py`
-and :source:`Lib/concurrent/futures/process.py`
+**Source code:** :source:`Lib/concurrent/futures/thread.py`,
+:source:`Lib/concurrent/futures/process.py`,
+and :source:`Lib/concurrent/futures/interpreter.py`
 
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