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

Author: renovate[bot]

.github/workflows/linting.yml

@@ -23,7 +23,7 @@ jobs:
         run_install: false
 
     - name: Set up node
-      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+      uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
       with:
         node-version-file: ".nvmrc"
         cache: "pnpm"

.github/workflows/testing.yml

@@ -23,7 +23,7 @@ jobs:
         run_install: false
 
     - name: Set up node
-      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+      uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
       with:
         node-version-file: ".nvmrc"
         cache: "pnpm"