New Features

• Make cleanup job history configurable (#26838)
• Added labels to specific Airflow components (#25031)
• Add StatsD overrideMappings in Helm chart values (#26598)
• Adding podAnnotations to StatsD deployment template (#25732)
• Container specific extra environment variables (#24784)
• Custom labels for extra Secrets and ConfigMaps (#25283)
• Add revisionHistoryLimit to all deployments (#25059)
• Adding podAnnotations to Redis StatefulSet (#23708)
• Provision Standalone Dag Processor (#23711)
• Add configurable scheme for webserver probes (#22815)
• Add support for KEDA HPA config to Helm chart (#24220)

Improvements

• Add 'executor' label to Airflow scheduler deployment (#25684)
• Add default flower_url_prefix in Helm chart values (#26415)
• Add liveness probe to Celery workers (#25561)
• Use sql_alchemy_conn for celery result backend when result_backend is not set (#24496)

Bug Fixes

• Fix pod template imagePullPolicy (#26423)
• Do not declare a volume for sshKeySecret if dag persistence is enabled (#22913)
• Pass worker annotations to generated pod template (#24647)
• Fix semver compare number for jobs check command (#24480)
• Use --local flag for liveness probes in Airflow 2.5+ (#24999)

Doc only changes

• Improve documentation on helm hooks disabling (#26747)
• Remove ssh:// prefix from git repo value (#26632)
• Fix defaultAirflowRepository comment (#26428)
• Baking DAGs into Docker image (#26401)
• Reload pods when using the same DAG tag (#24576)
• Minor clarifications about result_backend, dag processor, and helm uninstall (#24929)
• Add hyperlinks to GitHub PRs for Release Notes (#24532)
• Terraform should not use Helm hooks for starting jobs (#26604)
• Flux should not use Helm hooks for starting jobs (#24288)
• Provide details on how to pull Airflow image from a private repository (#24394)
• Helm logo no longer a link (#23977)
• Document LocalKubernetesExecutor support in chart (#23876)
• Update Production Guide (#23836)

Misc

• Default Airflow version to 2.4.1 (#26485)
• Vendor in the Bitnami chart (#24395)
• Remove kubernetes 1.20 support (#25871)