fix: update default Ansible versions to currently supported releases

Replace EOL stable-2.16/stable-2.17 and devel with stable-2.18,
stable-2.19, and stable-2.20 for sanity tests.

Author: sbaerlocher

.github/workflows/ci-ansible-collection.yml

@@ -22,7 +22,7 @@ on:
         description: 'JSON array of Ansible versions to test'
         required: false
         type: string
-        default: '["stable-2.16", "stable-2.17", "devel"]'
+        default: '["stable-2.18", "stable-2.19", "stable-2.20"]'
       enable_integration_tests:
         description: 'Enable integration tests'
         required: false

CHANGELOG.md

@@ -41,6 +41,8 @@ Initial repository setup:
 
 - **security-secrets.yml**: Replace `gitleaks-action` (requires paid license for orgs)
   with direct Gitleaks CLI installation via `jaxxstorm/action-install-gh-release`
+- **ci-ansible-collection.yml**: Update default Ansible versions from EOL
+  `stable-2.16`/`stable-2.17`/`devel` to supported `stable-2.18`/`stable-2.19`/`stable-2.20`
 
 ### Changed