chore: update node version used to publish

Prepare for semantic-release v23 which requires Node 20

.github/workflows/publish.yml

@@ -10,11 +10,11 @@ jobs:
   runs-on: ubuntu-latest
   steps:
   - name: Checkout
-    uses: actions/checkout@v3
+    uses: actions/checkout@v4
   - name: Setup Node.js
-    uses: actions/setup-node@v3
+    uses: actions/setup-node@v4
     with:
-      node-version: 18.x
+      node-version: 20
   - name: npm install
     run: |
       npm install
@@ -31,11 +31,11 @@ jobs:
   needs: [test]
   steps:
   - name: Checkout
-    uses: actions/checkout@v3
+    uses: actions/checkout@v4
   - name: Setup Node.js
-    uses: actions/setup-node@v3
+    uses: actions/setup-node@v4
     with:
-      node-version: 18.x
+      node-version: 20
   - name: npm install
     run: |
       npm install