Update checkout & login github actions

Author: mpe

.github/workflows/deploy.yml

@@ -20,13 +20,13 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build docker image
         run: make -C build rebuild-image@$SUBARCH@$IMAGE
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: linuxppc