My child tells everyone what happens at home

I am going through a phase where my child tells everyone even strangers what happens in our home. How can I support her to stop doing this because I don’t want her growing up being that person that people avoids because she tells people other people’s secrets. She is 6 years old. She “dad, mum went shopping again yesterday and bought so many things”. I was like damn girl you just had to out me like that 😭