Update ctypes status (yellow - uctypes exists but is different to CPython)

Standard-Library-Coverage.md

@@ -35,7 +35,7 @@
 | [copyreg](https://docs.python.org/3/library/copyreg.html#module-copyreg) |  Register pickle support functions. | ? | 
 | [cProfile](https://docs.python.org/3/library/profile.html#module-cProfile) |   | ? | 
 | [csv](https://docs.python.org/3/library/csv.html#module-csv) |  Write and read tabular data to and from delimited files. | ❌ | CPython splits the implementation into a Python module, [csv.py](https://github.com/python/cpython/blob/main/Lib/csv.py), and a C module, [_csv.c](https://github.com/python/cpython/blob/main/Modules/_csv.c). It might be possible to port _csv.c and use csv.py directly.
-| [ctypes](https://docs.python.org/3/library/ctypes.html#module-ctypes) |  A foreign function library for Python. | ? | 
+| [ctypes](https://docs.python.org/3/library/ctypes.html#module-ctypes) |  A foreign function library for Python. | 🟡 | See [uctypes](https://docs.micropython.org/en/latest/library/uctypes.html). Different to CPython to reduce memory use.
 | [curses](https://docs.python.org/3/library/curses.html#module-curses) |  An interface to the curses library, providing portable terminal handling. | ? | 
 | [curses.ascii](https://docs.python.org/3/library/curses.ascii.html#module-curses.ascii) |  Constants and set-membership functions for ASCII characters. | ✅ | [micropython-lib](https://github.com/micropython/micropython-lib/tree/master/python-stdlib/curses.ascii)
 | [curses.panel](https://docs.python.org/3/library/curses.panel.html#module-curses.panel) |  A panel stack extension that adds depth to  curses windows. | ? |