ci: bump actions/setup-node from 6.4.0 to 7.0.0

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 6.4.0 to 7.0.0.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@48b55a0...8207627)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -51,7 +51,7 @@ jobs:
             || opam switch create . ocaml-base-compiler.4.14.2 --no-install --yes
           opam exec -- ocaml -version
       - name: Set up Node.js
-        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v4
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v4
         with:
           node-version: "20"
       - name: Install dependencies
@@ -258,7 +258,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Set up Node.js
-        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v4
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v4
         with:
           node-version: "20"
       - name: Install test runner dependencies
@@ -303,7 +303,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Set up Node.js
-        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v4
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v4
         with:
           node-version: "20"
       - name: Install tree-sitter CLI