DEV-3389 rename the dir and title

subjects/displays/README.md

@@ -0,0 +1,16 @@
+## displays
+
+### Instructions
+
+Write a program that displays an `S` character on the standard folowed by newlines (`'\n'`)
+
+### Usage
+
+```console
+$ go run . | cat -e
+S$
+$ go run . "a" "b" | cat -e
+S$
+$ go run . "a" "b" "c" | cat -e
+S$
+```

subjects/onlys/README.md

@@ -1,16 +0,0 @@
-## onlys
-
-### Instructions
-
-Write a program that displays an `S` character on the standard output. (and nothing else)
-
-### Usage
-
-```console
-$ go run .
-S
-$ go run . "a" "b"
-S
-$ go run . "a" "b" "c"
-S
-```