DOC: sync xarray version (#38369)

fangchenli · web-flow · commit 523682fc6367 · 2020-12-08T15:59:45.000-05:00
Co-authored-by: VirosaLi &lt;2EkF8qUgpNkj&gt;
diff --git a/doc/source/whatsnew/v1.2.0.rst b/doc/source/whatsnew/v1.2.0.rst
@@ -482,7 +482,7 @@ Optional libraries below the lowest tested version may still work, but are not c
 +-----------------+-----------------+---------+
 | sqlalchemy      | 1.2.8           |    X    |
 +-----------------+-----------------+---------+
-| xarray          | 0.12.0          |    X    |
+| xarray          | 0.12.3          |    X    |
 +-----------------+-----------------+---------+
 | xlrd            | 1.2.0           |    X    |
 +-----------------+-----------------+---------+
