Correct repo example for cloning via ssh - comments in helm chart

[morkot]

In values.yaml file of helm chart there are two options for the git clone url one if which doesn't work. When anyone generates values file using command helm show values apache-airflow/airflow > values.yam and uses wrong example it leads to errors in git-sync.

Related:
#21970
#26632

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache Airflow community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/airflow/blob/main/CONTRIBUTING.rst)
Here are some useful points:

• Pay attention to the quality of your code (flake8, mypy and type annotations). Our pre-commits will help you with that.
• In case of a new feature add useful documentation (in docstrings or in docs/ directory). Adding a new operator? Check this short guide Consider adding an example DAG that shows how users should use it.
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• Be patient and persistent. It might take some time to get a review or get the final approval from Committers.
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• Be sure to read the Airflow Coding style.
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  In case of doubts contact the developers at:
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[morkot]

Hi @potiuk thanks for approving! I know it is tiny but it will save a lot of time for those who will stumble upon the same issue. Can it be merged, so I can forget about that?

[boring-cyborg]

Awesome work, congrats on your first merged pull request!

[jedcunningham]

Thanks @morkot! Congrats on your first commit 🎉