Update go, dependencies and ci

plugins/munin/munin.go

@@ -127,7 +127,7 @@ func (m *Munin) run() {
 	}
 }
 
-//Munin only samples once every 5 minutes so averages have to be calculated for some values.
+// Munin only samples once every 5 minutes so averages have to be calculated for some values.
 func calcMuninValues(m *muninData, newStatus *mk2driver.Mk2Info) {
 	m.timesUpdated++
 	m.status.OutCurrent += newStatus.OutCurrent

plugins/munin/munin_test.go

@@ -1,7 +1,7 @@
 package munin
 
 import (
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"testing"
@@ -21,7 +21,7 @@ func TestServer(t *testing.T) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	_, err = ioutil.ReadAll(res.Body)
+	_, err = io.ReadAll(res.Body)
 	res.Body.Close()
 	if err != nil {
 		log.Fatal(err)