Use node 20 in gh workflows (#22)

Author: jeanp413

.github/workflows/gitpod-web-docker.yml

@@ -6,21 +6,21 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Auth Google Cloud SDK
-        uses: google-github-actions/auth@v0
+        uses: google-github-actions/auth@v2
         with:
           credentials_json: ${{ secrets.GCP_SA_KEY }}
       - name: Set up Google Cloud SDK
-        uses: google-github-actions/setup-gcloud@v0
+        uses: google-github-actions/setup-gcloud@v2
         with:
           project_id: ${{ secrets.GCP_PROJECT_ID }}
       - name: Set up Docker
         run: |
           gcloud auth configure-docker --quiet
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: 'yarn'
           cache-dependency-path: '**/yarn.lock'
 
@@ -43,7 +43,7 @@ jobs:
           yarn --cwd gitpod-web/ inject-commit-hash
 
       - name: Docker build and push
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         with:
           push: true
           context: gitpod-web

.github/workflows/release-gitpod-remote.yml

@@ -7,11 +7,11 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Install dependencies
         run: |