Merge pull request #808 from adafruit/update-bootloader-083

update bootloader to 0.8.3

Author: hathach

bootloader/circuitplayground_nrf52840/circuitplayground_nrf52840_bootloader-0.8.2_s140_6.1.1.hex renamed to bootloader/circuitplayground_nrf52840/circuitplayground_nrf52840_bootloader-0.8.3_s140_6.1.1.hex

@@ -9742,7 +9742,7 @@
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@@ -11681,7 +11681,7 @@
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