Add coding to fix Cyrillic output

[badfeanor]

Jira

• "[AIRFLOW-6039] Not correctly displayed Cyrillic in the DAGs logs"
• https://issues.apache.org/jira/browse/AIRFLOW-6039

Description

• Add encoding to fix Cyrillic output

[codecov-io]

Codecov Report

Merging #6631 into master will decrease coverage by 0.31%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #6631      +/-   ##
==========================================
- Coverage    83.8%   83.48%   -0.32%     
==========================================
  Files         669      669              
  Lines       37548    37549       +1     
==========================================
- Hits        31466    31349     -117     
- Misses       6082     6200     +118

Impacted Files	Coverage Δ
airflow/utils/log/file_task_handler.py	88.76% <0%> (-1.01%)	⬇️
airflow/kubernetes/volume_mount.py	44.44% <0%> (-55.56%)	⬇️
airflow/kubernetes/volume.py	52.94% <0%> (-47.06%)	⬇️
airflow/kubernetes/pod_launcher.py	45.25% <0%> (-46.72%)	⬇️
airflow/kubernetes/refresh_config.py	50.98% <0%> (-23.53%)	⬇️
...rflow/contrib/operators/kubernetes_pod_operator.py	77.14% <0%> (-21.43%)	⬇️
airflow/configuration.py	89.13% <0%> (-3.63%)	⬇️
airflow/utils/dag_processing.py	58.31% <0%> (-0.17%)	⬇️
airflow/jobs/local_task_job.py	90% <0%> (+3.75%)	⬆️

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[potiuk]

Thanks!