clean up summarizer function

src/internal/util/summary.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 )
@@ -62,7 +62,7 @@ func Summarize(text string) (string, error) {
 	defer resp.Body.Close()
 
 	// Read the response
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return "", err
 	}