fix(workflows): update from actions/cache v2 to v4 (#2291)

Author: CorieW

.github/workflows/readmes-updated.yml

@@ -44,7 +44,7 @@ jobs:
           echo "::set-output name=dir::$(npm config get prefix)"
 
       - name: Cache global dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.global-deps-setup.outputs.dir }}
           key: