Meta: Instruct stale-bot to ignore `pr-is-blocked` PRs

.github/stale.yml

@@ -11,10 +11,8 @@ daysUntilClose: 7
 onlyLabels: []
 
 # Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
-# exemptLabels:
-#  - pinned
-#  - security
-#  - "[Status] Maybe Later"
+exemptLabels:
+    - "⛔ pr-is-blocked"
 
 # Set to true to ignore issues in a project (defaults to false)
 exemptProjects: true
@@ -60,4 +58,4 @@ only: pulls
 
 # issues:
 #   exemptLabels:
-#     - confirmeda
+#     - confirmed