Merge pull request #1004 from eslavich/eslavich-2.8.1-changelog

Update changelog for 2.8.1 release

Author: eslavich

CHANGES.rst

@@ -1,7 +1,7 @@
 2.9.0 (unreleased)
 ------------------
 
-2.8.1 (unreleased)
+2.8.1 (2021-06-09)
 ------------------
 
 - Fix bug in block manager when a new block is added to an existing

docs/asdf/changes.rst

@@ -4,6 +4,16 @@
 Changes
 *******
 
+What's new in ASDF 2.8.1?
+=========================
+
+The ASDF Standard is at v1.6.0.
+
+Changes include:
+
+- Fix bug that corrupts ndarray views when a new block is added
+  to an existing file in absence of a block index.
+
 What's new in ASDF 2.8.0?
 =========================