chore: try to use yarn config set

Author: MeriemMechri

.github/workflows/simorgh-unit-tests.yml

@@ -43,12 +43,14 @@ jobs:
         uses: v-venes/create-npmrc@v1.0.0
         with:
           org_name: bbc
-          auth_token: WS_UTF_AUTH
+          auth_token: $WS_UTF_AUTH
           always_auth: true
 
       - name: Install Node Modules
         if: steps.cache.outputs.cache-hit != 'true'
-        run: ./scripts/installNodeModules.sh
+        run: |
+          yarn config set 'npmRegistries["//npm.example.com"].npmAuthToken' $WS_UTF_AUTH
+          ./scripts/installNodeModules.sh
 
       - name: Build Simorgh - Express App
         run: yarn build