ci: Link Windows GDB against Python 3.8

This commit updates the CI workflow to link the Windows GDB build
against the Python version 3.8.

This aligns the Windows GDB Python version requirement with that of the
Linux and macOS GDB builds.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

.github/workflows/ci.yml

@@ -572,8 +572,8 @@ jobs:
           git clone \
             https://github.com/stephanosio/mingw-w64-libpython.git \
             ${WORKSPACE}/mingw-w64-libpython
-          # Use Python 3.6.8
-          export LIBPYTHON_KIT_ROOT=${WORKSPACE}/mingw-w64-libpython/python-3.6.8
+          # Use Python 3.8.3
+          export LIBPYTHON_KIT_ROOT=${WORKSPACE}/mingw-w64-libpython/python-3.8.3
           # Set Python configuration resolver for GDB
           cat <<EOF >> .config
         CT_GDB_CROSS_PYTHON=y