patch 9.1.0669: if_python: stable python ABI not used by default

Problem:  stable python ABI not used by default
Solution: Enable stable python ABI v3.8 when building with python3/dyn
          by default, update the default Python3 version to 3.8 for
          MS-Windows (Ken Takata)

closes: #15470
related: #15457

Signed-off-by: Ken Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 965a20d..c58e82e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    669,
+/**/
     668,
 /**/
     667,