bpo-42153 Fix link to IMAP documents in imaplib.rst (GH-23297)


The University of Washington stopped hosting the IMAP documents. Link to a rescued copy on GitHub.
(cherry picked from commit aa01011003bb855cd52abfd49f2443446590d913)

Co-authored-by: Yash Shete <universeyash4@gmail.com>
diff --git a/Doc/library/imaplib.rst b/Doc/library/imaplib.rst
index 02ecfd9..65681ec 100644
--- a/Doc/library/imaplib.rst
+++ b/Doc/library/imaplib.rst
@@ -174,9 +174,9 @@
 
 .. seealso::
 
-   Documents describing the protocol, and sources and binaries  for servers
-   implementing it, can all be found at the University of Washington's *IMAP
-   Information Center* (https://www.washington.edu/imap/).
+   Documents describing the protocol, sources for servers
+   implementing it, by the University of Washington's IMAP Information Center
+   can all be found at (**Source Code**) https://github.com/uw-imap/imap (**Not Maintained**).
 
 
 .. _imap4-objects: