Added STM32F7 Board

Boards-Summary.md

@@ -33,4 +33,5 @@ In addition to the pyboard the following have been identified as possibly suitab
 * [[Espruino Pico|Board-Espruino-Pico]] *($24.95)*
 * [[FEZ Cerb40 II|Board-FEZ-Cerb40]] *($24.95)* - same chip as pyboard - **done**
 * [[FEZ Lemur|Board-FEZ-Lemur]] *($24.95)* - STM32F401
-* [[G30HDR Module|Board-G30HDR]] *($14.95)* - STM32F401
+* [[G30HDR Module|Board-G30HDR]] *($14.95)* - STM32F401
+* [[STM32F7|Board-STM32F7] *($50.00)* - STM32F746