build: using sphinx supported typing.Unpack for unpacking tuple types (#15)

Co-authored-by: Al <altynbek.orumbayev@makerx.com.au>

Author: daniel-makerx

src/algopy_testing/arc4.py

@@ -942,7 +942,7 @@ def __getitem__(cls, key_t: tuple[type[_ABIEncoded], ...]) -> type:
 
 class Tuple(
     _ABIEncoded,
-    tuple[*_TTuple],
+    tuple[typing.Unpack[_TTuple]],
     typing.Generic[typing.Unpack[_TTuple]],
     metaclass=_TupleMeta,
 ):