Issue #25010: Fix path for .pyd example project.

Patch by Shaun Walbridge
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index 74a79c1..c034031 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -318,5 +318,5 @@
 -----------------------

 

 If you want to create your own extension module DLL (.pyd), there's an

-example with easy-to-follow instructions in ..\PC\example\; read the

+example with easy-to-follow instructions in ..\PC\example_nt\; read the

 file readme.txt there first.