Update module spf13/afero to v1.3.1 (#2571)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

go.mod

@@ -38,7 +38,7 @@ require (
 	github.com/robfig/cron/v3 v3.0.1
 	github.com/sideshow/apns2 v0.20.0
 	github.com/sirupsen/logrus v1.6.0
-	github.com/spf13/afero v1.3.0
+	github.com/spf13/afero v1.3.1
 	github.com/spf13/cobra v1.0.0
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/viper v1.7.0