Update actions/setup-node action to v7

Author: renovate[bot]

.github/workflows/graphs.yml

@@ -35,7 +35,7 @@ jobs:
           ref: ${{ github.head_ref || github.ref_name }}
           token: ${{ secrets.GH_PAT || github.token }}
       - name: Setup Node.js for graphs
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v7
         with:
           node-version: "20"
       - name: Generate graphs

.github/workflows/setup.yml

@@ -64,7 +64,7 @@ jobs:
           token: ${{ secrets.GH_PAT || github.token }}
       - name: Setup Node.js for direct graph generation
         if: steps.dispatch_graphs.outcome == 'failure'
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v7
         with:
           node-version: "20"
       - name: Generate graphs directly if dispatch fails