Add a Python 3.9 to asdf in SchooLinks.

Needed for some project that uses the CloudWatch Synthetics where the newest supported version is 3.9.

Add a Python 3.9 to asdf in SchooLinks.
437a34d6 · nimrod · faef040c · 437a34d6
Commit 437a34d6 authored 2 months ago by nimrod
--- a/Repositories/SchooLinks/.tool-versions
+++ b/Repositories/SchooLinks/.tool-versions
 nodejs 18.17.1 20.13.0
-python 3.11.9 3.12.4
+python 3.11.9 3.12.4 3.9.21