docs(changelog): version 2.6.6 [citest skip]

[spetrosi]

Update changelog and .README.html for version 2.6.6

Signed-off-by: Sergei Petrosian spetrosi@redhat.com

Summary by Sourcery

Document the 2.6.6 release, including the AD integration behavior change and related CI and refactoring updates.

Bug Fixes:

• Clarify that AD integration always sets krb5_canonicalize=false to avoid Kerberos principal canonicalization issues when joining to AD.

Enhancements:

• Improve AD integration documentation structure and add guidance for skipping ad_integration when nodes are already joined to AD.

CI:

• Document CI workflow updates in the changelog, including dependency bumps, Fedora test matrix changes, defaulting to ANSIBLE_INJECT_FACT_VARS=false, and conditional CI skipping based on PR titles.

Documentation:

• Update .README.html AD considerations section to better describe required variables, the option to skip ad_integration, and the krb5_canonicalize=false behavior.
• Add changelog entry for version 2.6.6 with details on the bug fix, CI updates, and refactors.

Chores:

• Record internal refactors in the changelog, including changes to fact handling and setup module subset usage.

[sourcery-ai]

Reviewer's Guide

Updates documentation for AD integration behavior and records the 2.6.6 release changes in the changelog, including a bug fix for krb5 canonicalization and several CI/refactor updates.

File-Level Changes

Change	Details	Files
Clarify and restructure AD integration configuration documentation in the generated HTML README, and document new behavior around krb5 canonicalization and conditional AD joining.	Restructured the AD integration variable description into a nested list to better associate required variables with the ad_integration role. Converted paragraph-based descriptions of ad_integration variables into list items for consistency and readability. Clarified that managed nodes already joined to AD can skip the ad_integration role via mssql_ad_join=false. Documented that the role now sets krb5_canonicalize=false when joining the AD realm to avoid principal canonicalization issues.	.README.html
Add 2.6.6 release entry capturing bug fix and CI/refactor changes.	Recorded version 2.6.6 release date and created a new section at the top of the changelog. Documented the bug fix ensuring krb5_canonicalize is always set to false when connecting to AD. Summarized several CI-related updates, including GitHub Actions version bumps, Fedora test matrix changes, ansible-lint updates, and conditional CI behavior based on PR titles.	CHANGELOG.md

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[spetrosi]

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