Remove cache requirement to hopefully fix build failure (mongodb-university#157)

Author: dacharyc

.github/workflows/deploy-docs.yaml

@@ -13,7 +13,6 @@ jobs:
       - uses: actions/setup-node@v2
         with:
           node-version: 21.x
-          cache: npm
       - name: Install Bluehawk dependencies
         run: |
           npm ci