docs: packages: falcon.yaml: add python-versions list as example

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>

Author: threexc

docs/packages/falcon.yaml

@@ -3,6 +3,7 @@ source-code: https://github.com/falconry/falcon
 license: Apache-2.0
 versions:
 - version: 4.4.0
+  python-versions: ['3.10', '3.11', '3.12', '3.13', '3.14', '3.14t', '3.15', '3.15t']
   tag: falcon-v4.4.0-20261021104813
   files:
   - filename: falcon-4.4.0-cp312-cp312-manylinux_2_31_riscv64.manylinux_2_39_riscv64.whl