Change maintenance test application

Author: semuelle

.github/workflows/ci.yml

@@ -17,12 +17,12 @@ jobs:
           cd applications;
           wget "https://raw.githubusercontent.com/w3f/Grants-Program/master/applications/LunoKit.md";
           cd ../maintenance;
-          wget "https://raw.githubusercontent.com/w3f/Grants-Program/master/applications/maintenance/wasm-opt-for-rust.md"
+          wget "https://raw.githubusercontent.com/w3f/Grants-Program/master/applications/maintenance/substrate-interface-maintenance.md"
       - name: Test action with normal application
         uses: ./
         with:
           path: applications/LunoKit.md
       - name: Test action with maintenance application
         uses: ./
         with:
-          path: maintenance/wasm-opt-for-rust.md
+          path: maintenance/substrate-interface-maintenance.md