ci: commands using npm instead of pnpm

.github/workflows/build.yml

@@ -56,7 +56,7 @@ jobs:
         run: pnpm install
 
       - name: Build all for production
-        run: npm run build-prod
+        run: pnpm run build-prod
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4

.github/workflows/lint.yml

@@ -53,4 +53,4 @@ jobs:
         run: pnpm install
 
       - name: Build with tsc & lint
-        run: npm run lint
+        run: pnpm run lint