chore: workflow tweaks (#930)

- Clear triage label when moved to next
- Only add triage label on new tickets

.github/workflows/workflow-next.yml

@@ -0,0 +1,18 @@
+# This name needs to be kept in sync with the workflow_run event in workflow-roadmap.yml
+name: Clear triage label when moved to next
+on:
+  issues:
+    types:
+      - labeled
+jobs:
+  clear-triage-label:
+    if: github.event.label.name == 'next'
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - run: gh issue edit "$NUMBER" --remove-label triage
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          NUMBER: ${{ github.event.issue.number }}

.github/workflows/workflow-roadmap.yml

@@ -14,6 +14,7 @@ on:
     workflows:
       - Add triage label to new issues
       - Clear workflow labels once an issue is assigned
+      - Clear triage label when moved to next
     types: [completed]
 concurrency:
   group: ${{ github.ref }}-workflow-roadmap

.github/workflows/workflow-triage.yml

@@ -3,9 +3,7 @@ name: Add triage label to new issues
 on:
   issues:
     types:
-      - reopened
       - opened
-      - unassigned
 jobs:
   label-issues:
     runs-on: ubuntu-latest