Update README.md with gh action tests badge

README.md

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 # go-sql-raw
+![tests](https://github.com/mysiar-org/go_sql_raw/actions/workflows/go.yml/badge.svg)
 
 The main reason that this module has been created was generic querying database without knowing table structure. 
 
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 * update type converting from DB to go in function `convertType`
 
 ## Credits
-* module inspired by https://gist.github.com/SchumacherFM/69a167bec7dea644a20e
+* module inspired by https://gist.github.com/SchumacherFM/69a167bec7dea644a20e