Run CI jobs on Node 23.x

23.x is now the current Node version. We should run the CI on that
version so it doesn't diverge too much from what is likely to be our
local setup.

Intl.DurationFormat is available in that release so we can remove one
test from the ignore file.

Author: ptomato

.github/workflows/test.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: use node.js v20.x
+      - name: use node.js v23.x
         uses: actions/setup-node@v3
         with:
-          node-version: 20.x
+          node-version: 23.x
       - run: npm ci
       - run: npm run test-demitasse
         env:
@@ -23,10 +23,10 @@ jobs:
       - uses: actions/checkout@v3
         with:
           submodules: true
-      - name: use node.js v20.x
+      - name: use node.js v23.x
         uses: actions/setup-node@v3
         with:
-          node-version: 20.x
+          node-version: 23.x
       - run: npm run codecov:test262
       - uses: codecov/codecov-action@v4
         with:
@@ -38,20 +38,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: use node.js v20.x
+      - name: use node.js v23.x
         uses: actions/setup-node@v3
         with:
-          node-version: 20.x
+          node-version: 23.x
       - run: npm ci
       - run: npm run test-cookbook
   test-validstrings:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: use node.js v20.x
+      - name: use node.js v23.x
         uses: actions/setup-node@v3
         with:
-          node-version: 20.x
+          node-version: 23.x
       - run: npm ci
       - run: |
           cd polyfill

polyfill/test/expected-failures.txt

@@ -27,6 +27,3 @@ staging/sm/Temporal/PlainDate/from-islamic-umalqura.js
 # Faulty leap month calculations in Chinese calendar in ICU4C
 # https://unicode-org.atlassian.net/browse/ICU-22230
 staging/sm/Temporal/PlainMonthDay/from-chinese-leap-month-uncommon.js
-
-# Fails until Intl.DurationFormat available in Node.js release
-intl402/Temporal/Duration/prototype/toLocaleString/returns-same-results-as-DurationFormat.js