Made a blind attempt to use Slack mrkdown as the section type for kudos so that links work

Author: mkimberlin

server/src/main/resources/slack/kudos_slack_blocks.json

@@ -10,7 +10,7 @@
   {
     "type": "section",
     "text": {
-      "type": "plain_text",
+      "type": "mrkdwn",
       "text": "%s"
     }
   },