chore(deps): update docker/login-action action to v4

Author: renovate[bot]

.github/workflows/deployment.yml

@@ -110,7 +110,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Login to GitHub container registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -137,7 +137,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Login to GitHub container registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.actor }}

.github/workflows/gubbins-test.yml

@@ -216,7 +216,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Login to GitHub container registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.actor }}