chore: upgrade ci node version

.github/workflows/admin.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x]
+        node-version: [18.x]
     steps:
       - name: checkout
         uses: actions/checkout@v2

.github/workflows/ci.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x]
+        node-version: [18.x]
     steps:
       - name: checkout
         uses: actions/checkout@v2

.github/workflows/deploy-github-app.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x]
+        node-version: [18.x]
     steps:
     - uses: actions/checkout@v1
     - name: Deploy to Vercel

.github/workflows/deploy-website.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x]
+        node-version: [18.x]
     defaults:
       run:
         working-directory: website