Pin ansible-core to earlier than 2.16.3

As described in cisagov/skeleton-ansible-role#178 this is a breaking
bug for how we use Ansible with Ansible roles.

Co-authored-by: Shane Frasier <jeremy.frasier@gwe.cisa.dhs.gov>

requirements.txt

@@ -13,6 +13,15 @@
 # often breaking changes across major versions.  This is the reason
 # for the upper bound.
 ansible>=8,<10
+# TODO: Remove this pin when possible.  See
+# cisagov/skeleton-ansible-role#178 for more details.
+#
+# ansible-core 2.16.3 and later suffer from the bug discussed in
+# ansible/ansible#82702, which breaks any symlinked files in vars,
+# tasks, etc. for any Ansible role installed via ansible-galaxy.
+#
+# See also cisagov/skeleton-packer#312.
+ansible-core<2.16.3
 boto3
 setuptools
 wheel