ci: correct setup-node pin comment to v7.0.0 (follow-up #720)

Dependabot bumped the setup-node SHA to v7.0.0 (820762786...) but left the
pin comment reading # v6. Align the comment with the actual pinned version.

.github/workflows/test.yml

@@ -44,7 +44,7 @@ jobs:
         # the suite never silently switches state on env presence.
         run: pytest --ignore=agent/tests/e2e_backtest --ignore=agent/tests/test_e2e_harness_v2.py --cov=agent --cov-report=term-missing --cov-report=xml --tb=short -q
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v6
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: "20"
           cache: npm

.github/workflows/wiki.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
-      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v6
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: "20"