Update CPython sprint info (#1428)

Author: hugovk

src/content/sprints/cpython.md

@@ -9,9 +9,22 @@ links:
   - title: "CPython's Developer Guide"
     url: "https://devguide.python.org/"
   - title: "Code of Conduct"
-    url: "https://www.python.org/psf/conduct/"
+    url: "https://policies.python.org/python.org/code-of-conduct/"
   - title: "Easy Issues"
     url: "https://github.com/python/cpython/issues?q=is%3Aissue+is%3Aopen+label%3Aeasy"
 ---
 
-Come sprint on CPython and work on Python 3.15!
+Come sprint on CPython and work on Python 3.14 and 3.15!
+
+Sprints will focus on release candidate fixes to Python 3.14 (to be released
+this October), with some limited new feature work for 3.15 (final version in
+October 2026).
+
+1. Recommended for Python users with 2+ years of experience.
+2. Read
+   [what to expect](https://pycon.blogspot.com/2025/04/pyconus-sprints.html)
+   (about PyCon US sprints, but a lot applies here!).
+3. Fork and clone the repository _before_ coming to the venue in case of slow
+   wifi :)
+4. Use the [Python Developer's Guide](https://devguide.python.org/) to go
+   through the initial build on you machine.