fix: update build command for documentation generation in GitHub Actions workflow

Author: scholtz

.github/workflows/gh-pages.yml

@@ -9,7 +9,7 @@ jobs:
         with:
           node-version: 10
       - run: npm install
-      - run: npm run-script build:docs
+      - run: npm run docs:build
       - name: Deploy Docs
         uses: JamesIves/[email protected]
         with: