Update README.md

add(subject): add rev-args subject
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+### rev-arg
+
+### Instructions
+
+Write a program that takes the command line arguments and prints them in reverse order.
+- if the number of arguments is less than 1, print (`'\n'`)
+
+### Usage
+
+```console
+$ go run . | cat -e
+$
+$ go run . "Hello World!" | cat -e
+Hello World!$
+$ go run . "Hello World!" "World!" "All" | cat -e
+All World! Hello World!$
+$ go run . 1 2 3 4 | cat -e
+4 3 2 1$
+```
Author	SHA1	Message	Date
Hamza elkhatri	236084b9ab	Update README.md	2 years ago
hamza	9d1465f391	add(subject): add rev-args subject	2 years ago