Update README.md

Author: chrmlinux

README.md

@@ -14,5 +14,5 @@ changed.
 for Arduino
 ![arduino.JPG](https://github.com/chrmlinux/tinyCore/blob/main/doc/Arduino.JPG)
 # v0.3.0
-for Arduino
+for SPRESENSE
 ![SPRESENSE.PNG](https://github.com/chrmlinux/tinyCore/blob/main/doc/SPRESENSE.png)