main: Update workflows

Author: sjchapmanuk

.github/workflows/ci.yml

@@ -21,6 +21,7 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'npm'
+      - run: apt-get update && apt-get install libxml2-utils
       - run: npm ci
       - run: npm run build
       - run: npm test