Update Projects (#764)

Signed-off-by: LFCIBot <[email protected]>

Author: LFCIBot

website/data/projects.json

@@ -3475,7 +3475,7 @@
         "stack_overflow_url": null,
         "blog_url": null,
         "mailing_list_url": "https://groups.google.com/g/ovn-kubernetes",
-        "slack_url": "https://cloud-native.slack.com/messages/ovn-kubernetes",
+        "slack_url": "https://cloud-native.slack.com/messages/C08452HR8V6/details/",
         "gitter_url": null,
         "youtube_url": null,
         "language": "Go"