Merge pull request #265 from dhalbert/fix-cpb-image

fix CPB image filename; fixe robhatmm1_m4 file fields

Author: tannewt

_board/circuitplayground_bluefruit.md

@@ -5,7 +5,7 @@ title: "Circuit Playground Bluefruit Download"
 name: "Circuit Playground Bluefruit"
 manufacturer: "Adafruit"
 board_url: ""
-board_image: "feather_nrf52840_express.jpg"
+board_image: "circuitplayground_bluefruit.jpg"
 features:
   - Speaker
   - Solder-free Alligator Cip

_board/robohatmm1_m4.md

@@ -1,8 +1,8 @@
 ---
 layout: download
-board_id: "robohatmm1_m0"
+board_id: "robohatmm1_m4"
 title: "Robo HAT MM1 Download"
-name: "Robo HAT MM1 M0"
+name: "Robo HAT MM1 M4"
 manufacturer: "Robotics Masters"
 board_url: "https://www.crowdsupply.com/robotics-masters/robo-hat-mm1"
 board_image: "robohatmm1.jpg"