refactor: move from io/ioutil to io and os packages (#1417)

The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit
replaces the existing io/ioutil functions with their new definitions in
io and os packages.

[1]: https://golang.org/doc/go1.16#ioutil
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/container/docker_run.go

@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -769,7 +768,7 @@ func (cr *containerReference) waitForCommand(ctx context.Context, isTerminal boo
 func (cr *containerReference) copyDir(dstPath string, srcPath string, useGitIgnore bool) common.Executor {
 	return func(ctx context.Context) error {
 		logger := common.Logger(ctx)
-		tarFile, err := ioutil.TempFile("", "act")
+		tarFile, err := os.CreateTemp("", "act")
 		if err != nil {
 			return err
 		}