Add promo img for iot dev survey 2020

Change-Id: Ied5d4cb12130bd4ac85b7cf89f21b080de573045
Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/promo/images/iot-dev-survey-2020.png b/promo/images/iot-dev-survey-2020.png
new file mode 100644
index 0000000..7c385f6
--- /dev/null
+++ b/promo/images/iot-dev-survey-2020.png
Binary files differ