Add changelog for pytest 6.x fix.

pytest 6.x support was fixed in 40cdb9c for 1.3 and in ffafbd4
for master.   Add a note as this is an observable issue
in 1.3.19.

Fixes: #5635
Change-Id: Iee67822d6962800646546c69ee0ad0c494007c86

diff --git a/doc/build/changelog/unreleased_13/5635.rst b/doc/build/changelog/unreleased_13/5635.rst
new file mode 100644 (file)
index 0000000..08507c4
--- /dev/null
+++ b/doc/build/changelog/unreleased_13/5635.rst
@@ -0,0 +1,7 @@
+.. change::
+    :tags: bug, tests
+    :tickets: 5635
+
+    Fixed incompatibilities in the test suite that prevented the tests from
+    working with Pytest 6.x.
+