Bump actions/setup-node from 4 to 6

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/compare/v4...v6)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/ci-test.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '20'
       - name: Install Dependencies

.github/workflows/deploy.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '20'
       - name: Install Dependencies

yarn.lock

@@ -1955,20 +1955,13 @@ __metadata:
   languageName: node
   linkType: hard
 
-"tailwindcss@npm:4.1.1":
+"tailwindcss@npm:4.1.1, tailwindcss@npm:^4.1.1":
   version: 4.1.1
   resolution: "tailwindcss@npm:4.1.1"
   checksum: bf85c7f0f051ceabfe6981bedc9ad8c0eed0cb37f9269066cc00c4b0575c4689c01e461027a82fde8534f7b4c5151d63d48e19e808fce60171d73ea759a81464
   languageName: node
   linkType: hard
 
-"tailwindcss@npm:^4.1.1":
-  version: 4.1.16
-  resolution: "tailwindcss@npm:4.1.16"
-  checksum: 04081aeb7cdb38834974a19d65802890370d37358332375ae81085b0be3dc202b85d496442cd2f10ae9bda3e039feedb1d9968236bdec2b188efebda504282d5
-  languageName: node
-  linkType: hard
-
 "tapable@npm:^2.2.0":
   version: 2.2.1
   resolution: "tapable@npm:2.2.1"