Update github-actions

Author: renovate[bot]

.github/workflows/ubuntu-18.04.yml

@@ -13,20 +13,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v2
+      uses: docker/setup-buildx-action@v3
 
     - name: Login to the GitHub Container Registry
-      uses: docker/login-action@v2
+      uses: docker/login-action@v3
       with:
         registry: ghcr.io
         username: ${{ secrets.GHCR_USER }}
         password: ${{ secrets.GHCR_TOKEN }}
 
     - name: Build and push image
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v5
       with:
         push: true
         context: .