tex-babel-greek: update to 1.13.1

Fix errors with the 2022/06 implementation of `\MakeUppercase`:

- Do not change the uccode values if the LaTeX version is newer than 2022/06.
  The new ``\MakeUppercase`` definition ignores them and fails
  with the "dummy" character 0x9f (cf. [ltnews35], `LaTeX issue 987`).

- TODO: Fix upcasing of accented characters with "short accent macros"
  and with "LGR transliteration".

New modifiers ``local-LGR-fixes`` and ``no-LGR-fixes`` to address
indexing problmes with Roman numerals (`Babel issue 170`_). Provisional.

New TextCommand ``\EnsureStandardFontEncoding``.

Rename ``\textgreek`` to ``\lgrfont`` to avoid confusion with a
language changing command.

(markd)