chore(deps): bump actions/setup-node from 6 to 7

.github/workflows/backend-tests.yml

@@ -26,7 +26,7 @@ jobs:
         with:
           repository: ether/etherpad-lite
           path: etherpad-lite
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v7
         name: Install Node.js
         with:
           node-version: 25

.github/workflows/frontend-tests.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           repository: ether/etherpad-lite
           path: etherpad-lite
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v7
         name: Install Node.js
         with:
           node-version: 25

.github/workflows/npmpublish.yml

@@ -18,7 +18,7 @@ jobs:
       contents: write   # for the atomic version-bump push (branch + tag)
       id-token: write   # for npm OIDC trusted publishing
     steps:
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v7
         with:
           # OIDC trusted publishing needs npm >= 11.5.1, which requires
           # Node >= 20.17.0. setup-node's `20` resolves to the latest