chore: increase duplicate threshold

.github/workflows/potential-duplicates.yml

@@ -20,7 +20,7 @@ jobs:
           # Get issues with state to compare. Supported state: 'all', 'closed', 'open'.
           state: all
           # If similarity is higher than this threshold([0,1]), issue will be marked as duplicate.
-          threshold: 0.6
+          threshold: 0.8
           # Reactions to be add to comment when potential duplicates are detected.
           # Available reactions: "-1", "+1", "confused", "laugh", "heart", "hooray", "rocket", "eyes"
           #reactions: 'eyes, confused'