Update docs (#1238)

* Update docs

* Bump dask xfail to Aug 8

Author: ihnorton

doc/source/python-api.rst

@@ -1,10 +1,6 @@
 TileDB Python API Reference
 ===========================
 
-.. warning::
-
-   The Python interface to TileDB is still under development and the API is subject to change.
-
 Modules
 -------
 

tiledb/tests/test_dask.py

@@ -47,7 +47,7 @@ def _make_multiattr_2d(self, uri, shape=(0, 100), tile=10):
         tiledb.DenseArray.create(uri, schema)
 
     @pytest.mark.xfail(
-        datetime.now() < datetime(2022, 7, 19),
+        datetime.now() < datetime(2022, 8, 8),
         reason=(
             "`DeprecationWarning` being thrown by Dask but will be fixed by "
             "https://github.com/dask/distributed/issues/6163"