Bump antsibull-changelog version for changelog sanity test.

changelogs/fragments/73428-changelog-linting-bump-version.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- "ansible-test sanity changelog test - bump dependency on antsibull-changelog to 0.9.0 so that `fragments that add new plugins or objects <https://github.com/ansible-community/antsibull-changelog/blob/main/docs/changelogs.rst#adding-new-roles-playbooks-test-and-filter-plugins>`_ will not fail validation (https://github.com/ansible/ansible/pull/73428)."

test/lib/ansible_test/_data/requirements/constraints.txt

@@ -49,7 +49,7 @@ setuptools < 45 ; python_version == '2.7' # setuptools 45 and later require pyth
 gssapi < 1.6.0 ; python_version <= '2.7' # gssapi 1.6.0 and later require python 3 or later
 
 # freeze antsibull-changelog for consistent test results
-antsibull-changelog == 0.7.0
+antsibull-changelog == 0.9.0
 
 # Make sure we have a new enough antsibull for the CLI args we use
 antsibull >= 0.21.0