ci: use ghcr.io cosmos website-deployment image (#13156)

.github/workflows/deploy-docs.yml

@@ -20,7 +20,7 @@ jobs:
       contents: write # for JamesIves/github-pages-deploy-action to push changes in repo
     runs-on: ubuntu-latest
     container:
-      image: tendermintdev/docker-website-deployment
+      image: ghcr.io/cosmos/website-deployment
     steps:
       - name: Checkout 🛎️
         uses: actions/checkout@v3
@@ -28,9 +28,8 @@ jobs:
           persist-credentials: false
           fetch-depth: 0
 
-      - name: Install and Build 🔧
+      - name: Build 🔧
         run: |
-          apk add rsync csplit
           make build-docs LEDGER_ENABLED=false
 
       - name: Deploy 🚀