chore(deps): update actions/setup-node action to v6 (#125)

Author: renovate[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v5
 
     - name: Use Node.js
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version-file: '.nvmrc'
         cache: 'yarn'
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
         - uses: actions/checkout@v5
-        - uses: actions/setup-node@v5
+        - uses: actions/setup-node@v6
           with:
             node-version-file: .nvmrc
             cache: 'yarn'