use docker login-action and github.actor

Author: s-urbaniak

.github/workflows/tests-selectable.yaml

@@ -151,8 +151,12 @@ jobs:
           path: |
             ./*
           key: ${{ github.sha }}
-      - name: Log in to ghcr.io registry
-        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and Push image
         uses: ./.github/actions/build-push-image
         with: