Update actions/setup-node action to v6 (#284)

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

Author: renovate[bot]

.github/workflows/check.yml

@@ -9,7 +9,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: 'npm'
@@ -26,7 +26,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
 
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: 'npm'

.github/workflows/release.yml

@@ -6,7 +6,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: 'npm'