badges: update

README.md

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 ![Tests](https://github.com/mysiar-org/go_sql_raw/actions/workflows/tests.yml/badge.svg)
 [![Go Reference](https://pkg.go.dev/badge/github.com/mysiar-org/go_sql_raw.svg)](https://pkg.go.dev/github.com/mysiar-org/go-sql-raw)
 [![Gosec](https://github.com/mysiar-org/go_sql_raw/actions/workflows/gosec.yml/badge.svg)](https://github.com/mysiar-org/go_sql_raw/actions/workflows/gosec.yml)
-![Coverage](https://raw.githubusercontent.com/nao1215/octocovs-central-repo/main/badges/nao1215/markdown/coverage.svg)
 
+![coverage](docs/coverage.svg) ![coverage](docs/ratio.svg) ![coverage](docs/time.svg)
 The main reason that this module has been created was generic querying database without knowing table structure. 
 
 ## How to use it