add sample

sample/sample.go

@@ -0,0 +1,14 @@
+// Package sample is used as test input for golangci action.
+package sample
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+)
+
+// Hash~
+func Hash(data string) string {
+	h := md5.New()
+	h.Write([]byte(data))
+	return hex.EncodeToString(h.Sum(nil))
+}