Update actions/setup-node action to v7 (#1042)

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

Author: renovate[bot]

.github/actions/setup/action.yaml

@@ -7,7 +7,7 @@ runs:
       uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
     - name: Set up Node.js
-      uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+      uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
       with:
         node-version: '24.18.0'
 

.github/workflows/upstream-release-docs.yml

@@ -296,7 +296,7 @@ jobs:
       # with its own actions/checkout that overwrites the PR-branch
       # checkout above with the dispatching branch.
       - name: Set up Node.js
-        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: '24.18.0'