fix(coverage): fix the repository name for codecov

Signed-off-by: Dusan Malusev <dusan@dusanmalusev.dev>

Author: CodeLieutenant

.github/workflows/go.yml

@@ -43,4 +43,4 @@ jobs:
         uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          slug: CodeLieutenant/mailpit-go-api
+          slug: CodeLieutenant/mailpitclient