fix: use outcome instead of conclusion in check-dist workflow

Author: BrandonLWhite

.github/workflows/check-dist.yml

@@ -41,7 +41,7 @@ jobs:
           fi
 
       - name: Upload dist artifact for inspection
-        if: failure() && steps.diff.conclusion == 'failure'
+        if: failure() && steps.diff.outcome == 'failure'
         uses: actions/upload-artifact@v4
         with:
           name: dist