Update changelog generation configuration

* Added missing changelog entries
* Updated configuration for changelog generation

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

changelogs/config.yaml

@@ -0,0 +1,29 @@
+changelog_filename_template: ../CHANGELOG.rst
+changelog_filename_version_depth: 0
+changes_file: ../changelog.yaml
+changes_format: combined
+keep_fragments: true
+mention_ancestor: true
+new_plugins_after_name: removed_features
+notesdir: fragments
+prelude_section_name: release_summary
+prelude_section_title: Release Summary
+sections:
+- - major_changes
+  - Major Changes
+- - minor_changes
+  - Minor Changes
+- - breaking_changes
+  - Breaking Changes / Porting Guide
+- - deprecated_features
+  - Deprecated Features
+- - removed_features
+  - Removed Features (previously deprecated)
+- - security_fixes
+  - Security Fixes
+- - bugfixes
+  - Bugfixes
+- - known_issues
+  - Known Issues
+title: ansible.posix
+trivial_section_name: trivial