ci: fetch before release

.github/workflows/ci.yml

@@ -99,6 +99,9 @@ jobs:
         with:
           abort-after-seconds: 600
 
+      - name: Fetch
+        run: git fetch --all
+
       - name: Create release
         if: steps.turnstyle.outcome == 'success'
         # failing to release a canary because of network problems or duplicate tag shouldn't give the same message as failing tests