chore: fix lint warnings

Signed-off-by: Cosmin Cojocar <gcojocar@adobe.com>

cmd/gosec/main.go

@@ -17,7 +17,7 @@ package main
 import (
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"os"
 	"runtime"
@@ -354,7 +354,7 @@ func main() {
 	}
 
 	if *flagQuiet {
-		logger = log.New(ioutil.Discard, "", 0)
+		logger = log.New(io.Discard, "", 0)
 	} else {
 		logger = log.New(logWriter, "[gosec] ", log.LstdFlags)
 	}

cmd/tlsconfig/tlsconfig.go

@@ -7,9 +7,9 @@ import (
 	"flag"
 	"fmt"
 	"go/format"
-	"io/ioutil"
 	"log"
 	"net/http"
+	"os"
 	"path/filepath"
 
 	"github.com/mozilla/tls-observatory/constants"
@@ -187,7 +187,7 @@ func main() {
 	}
 
 	outputPath := filepath.Join(dir, *outputFile)
-	if err := ioutil.WriteFile(outputPath, src, 0o644); err != nil {
+	if err := os.WriteFile(outputPath, src, 0o644); err != nil {
 		log.Fatalf("Writing output: %s", err)
 	} //#nosec G306
 }