Update Node.js version to 25.9.x in build and publish workflows

Author: Knerio

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Node
         uses: actions/setup-node@v6
         with:
-          node-version: '24.x'
+          node-version: '25.9.x'
           registry-url: 'https://registry.npmjs.org'
       - name: Install dependencies
         run: npm ci

.github/workflows/publish.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Set up Node
         uses: actions/setup-node@v6
         with:
-          node-version: '24.x'
+          node-version: '25.9.x'
           registry-url: 'https://registry.npmjs.org'
       - name: Install dependencies
         run: npm ci

mise.toml

@@ -1,2 +1,3 @@
 [tools]
+node = "25.9.0"
 ruby = "latest"