chore: use new style octal (#1630)

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

pkg/common/git/git_test.go

@@ -167,7 +167,7 @@ func TestGitFindRef(t *testing.T) {
 		name := name
 		t.Run(name, func(t *testing.T) {
 			dir := filepath.Join(basedir, name)
-			require.NoError(t, os.MkdirAll(dir, 0755))
+			require.NoError(t, os.MkdirAll(dir, 0o755))
 			require.NoError(t, gitCmd("-C", dir, "init", "--initial-branch=master"))
 			require.NoError(t, cleanGitHooks(dir))
 			tt.Prepare(t, dir)