ci: fix typo in artifact upload check

Author: DASPRiD

.github/workflows/release.yml

@@ -59,7 +59,7 @@ jobs:
           files: "dist-release"
 
       - name: Upload artifact
-        if: steps.check_files.outputs.files_exists == 'true'
+        if: steps.check-files.outputs.files_exists == 'true'
         uses: actions/upload-pages-artifact@v1
         with:
           path: dist-release