[newlib-cygwin/cygwin-3_6-branch] Cygwin: CI: Update python module packages now python3.12 is the default

[Jon Turney]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b20c61c0f3ccb034c9b9aa566af93c6efda484a5

commit b20c61c0f3ccb034c9b9aa566af93c6efda484a5
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Tue Sep 8 12:38:20 2026 +0100

    Cygwin: CI: Update python module packages now python3.12 is the default
    
    (cherry picked from commit 935d5dae0f0309f420ba85f284b226db67c25740)

Diff:
---
 .github/workflows/cygwin.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
index 877f54cde..8dab50b00 100644
--- a/.github/workflows/cygwin.yml
+++ b/.github/workflows/cygwin.yml
@@ -139,8 +139,8 @@ jobs:
           mingw64-${{ matrix.pkgarch }}-zlib,
           patch,
           perl,
-          python39-lxml,
-          python39-ply,
+          python3-lxml,
+          python3-ply,
           texlive-collection-fontsrecommended,
           texlive-collection-latexrecommended,
           texlive-collection-pictures,