Update readme.md

Author: LaZsolt

docs/arduino/readme.md

@@ -1,6 +1,6 @@
-Now in v1.0.7 custom board selection is available.
+Now in v2.0.0 (and above) custom board selection is available.
 - You can choose the speed of the crystal that the board equipped with.
-- You can choose variant of MCUs. (chip marks AVGA328P = 328P-LQFP32 , MD-328D = 328D) 
+- You can choose variant of MCUs. (chip marks AVGA328P = 328P-LQFP32 , MD-328D = 328D , MD-3248P = 328P-LQFP48) 
 - May vary the upload speed depends on bootloader.
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