Aleksei Zimonin

change backticks to $(...) syntax

2

see also shellcheck https://www.shellcheck.net/wiki/SC2006 I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/?lang=ru Description of changes:

Missing "a" in "Layer 7 Load Blancing"

### Preflight Checklist - [X] I agree to follow the [Code of Conduct](https://github.com/deckhouse/deckhouse/blob/main/CODE_OF_CONDUCT.md) that this project adheres to. - [X] I have searched the [issue tracker](https://github.com/deckhouse/deckhouse/issues) for an issue that...