Update ghpages.yml with permissions

Author: ajeanmahoney

.github/workflows/ghpages.yml

@@ -18,6 +18,8 @@ jobs:
   build:
     name: "Update Editor's Copy"
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
     - name: "Checkout"
       uses: actions/checkout@v4
@@ -27,7 +29,7 @@ jobs:
       run: date -u "+date=%FT%T" >>"$GITHUB_OUTPUT"
 
     - name: "Caching"
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: |
           .refcache