TUN-7590: Remove usages of ioutil

supervisor/cloudflare_status_page.go

@@ -2,7 +2,7 @@ package supervisor
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 	"time"
@@ -72,7 +72,7 @@ func fetchActiveIncidents() (incidents []Incident) {
 		return
 	}
 	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return
 	}