Update actions/setup-node action to v6 (#35)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/check-version.yml

@@ -25,7 +25,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '20'
 

.github/workflows/lint-and-test.yml

@@ -107,7 +107,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: '20.x'
       - run: cargo install wasm-pack

.github/workflows/publish.yml

@@ -47,7 +47,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: Swatinem/rust-cache@v2
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: '22.x'
           registry-url: 'https://registry.npmjs.org'