chore: Make codecov badge green in README (#795)

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Co-authored-by: 🇺🇦 Sviatoslav Sydorenko (Святослав Сидоренко) <[email protected]>

Author: MaxymVlasov

README.md

@@ -11,7 +11,7 @@ https://github.com/antonbabenko/pre-commit-terraform/actions/workflows/ci-cd.yml
 https://github.com/antonbabenko/pre-commit-terraform/actions/workflows/ci-cd.yml
 
 [Codecov Badge]:
-https://codecov.io/gh/antonbabenko/pre-commit-terraform/branch/master/graph/badge.svg?flags[]=pytest
+https://codecov.io/gh/antonbabenko/pre-commit-terraform/branch/master/graph/badge.svg?flag=pytest
 [Codecov]: https://app.codecov.io/gh/antonbabenko/pre-commit-terraform?flags[]=pytest
 
 [![SWUbanner](https://raw.githubusercontent.com/vshymanskyy/StandWithUkraine/main/banner-direct.svg)](https://github.com/vshymanskyy/StandWithUkraine/blob/main/docs/README.md)