chore(github-actions): use .nvmrc to set node version

Author: SoonIter

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version-file: '.nvmrc'
       - name: Install sg
         run: npm install -g @ast-grep/cli
       - name: Install deps

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version-file: '.nvmrc'
       - name: Install deps
         run: npm install
       - name: Install vsce