Update build.yml

Author: basarat

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
  - run: sudo apt update
  - run: sudo apt install calibre-bin
  - run: sudo npm install -g gitbook-cli
- - run: npm clean cache --force # https://github.com/nodejs/help/issues/2874
+ - run: npm cache clean --force # https://github.com/nodejs/help/issues/2874
  - run: gitbook install
  - run: mkdir output
  - run: gitbook pdf . ./output/typescript-book-${SHA}.pdf