fix: Don't defer rows.Close() if pgx.BatchResults.Query() failed (#2362)

* Small whitespace change in golang codegen template

* Don't defer rows.Close() if pgx.BatchResults.Query() failed

To appease staticcheck

Author: Jille

Diff for: examples/batch/postgresql/batch.go

@@ -84,11 +84,11 @@ func (b *{{.MethodName}}BatchResults) Query(f func(int, []{{.Ret.DefineType}}, e
         continue
      }
      err := func() error {
-	    rows, err := b.br.Query()
-       defer rows.Close()
+       rows, err := b.br.Query()
        if err != nil {
          return err
        }
+       defer rows.Close()
        for rows.Next() {
            var {{.Ret.Name}} {{.Ret.Type}}
            if err := rows.Scan({{.Ret.Scan}}); err != nil {