Update image

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-1344@1771642 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/site/src/documentation/resources/images/en_US/slack-configure-slack-webhook.PNG b/site/src/documentation/resources/images/en_US/slack-configure-slack-webhook.PNG
index 9821e66..dca00b9 100644
--- a/site/src/documentation/resources/images/en_US/slack-configure-slack-webhook.PNG
+++ b/site/src/documentation/resources/images/en_US/slack-configure-slack-webhook.PNG
Binary files differ