Add Snyk promo ad image

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/promo/images/snyk.png b/promo/images/snyk.png
new file mode 100644
index 0000000..c2f346a
--- /dev/null
+++ b/promo/images/snyk.png
Binary files differ