docs(changelog): version 1.6.4 [citest skip]

Update changelog and .README.html for version 1.6.4

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

Author: richm

CHANGELOG.md

@@ -1,6 +1,15 @@
 Changelog
 =========
 
+[1.6.4] - 2024-06-11
+--------------------
+
+### Other Changes
+
+- ci: use tox-lsr 3.3.0 which uses ansible-test 2.17 (#178)
+- ci: tox-lsr 3.4.0 - fix py27 tests; move other checks to py310 (#180)
+- ci: Add supported_ansible_also to .ansible-lint (#181)
+
 [1.6.3] - 2024-04-04
 --------------------