Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/check-links-in-documentation.yml

@@ -19,7 +19,7 @@ jobs:
       uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
 
     - name: Setup node.js
-      uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5
+      uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
       with:
         node-version-file: '.nvmrc'
 

.github/workflows/check-renovate-config.yml

@@ -16,7 +16,7 @@ jobs:
       uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
 
     - name: Setup node.js
-      uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5
+      uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
       with:
         node-version-file: '.nvmrc'