ci: set the working directory when building docs

.github/workflows/deploy.yml

@@ -186,10 +186,12 @@ jobs:
         uses: actions/checkout@v2.3.4
 
       - name: Setup | Install dependencies
-        run: cd docs && npm install
+        run: npm install
+        working-directory: docs
 
       - name: Build | Build docs site
         run: npm run build
+        working-directory: docs
 
       - name: Publish
         uses: netlify/actions/cli@master
@@ -198,3 +200,4 @@ jobs:
         env:
           NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
           NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+        working-directory: docs