ci: Pin Node.js to v20 in all workflows

Node.js 24 is now the latest LTS, which causes yarn v1 to hang
during install. Pin to Node 20 (our tested version) until we can
validate compatibility with newer versions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: chargome

.github/workflows/ci-cd.yml

@@ -21,10 +21,10 @@ jobs:
           # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
           fetch-depth: 0
 
-      - name: Setup Node.js lts/*
+      - name: Setup Node.js 20
         uses: actions/setup-node@v3
         with:
-          node-version: lts/*
+          node-version: '20'
           cache: 'yarn'
 
       - name: Install Dependencies
@@ -58,10 +58,10 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v3
 
-      - name: Setup Node.js lts/*
+      - name: Setup Node.js 20
         uses: actions/setup-node@v3
         with:
-          node-version: lts/*
+          node-version: '20'
           cache: 'yarn'
 
       - name: Install Dependencies

.github/workflows/eslint-check.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: lts/*
+          node-version: '20'
           cache: 'yarn'
       - name: Install Dependencies
         run: yarn install --frozen-lockfile
@@ -81,7 +81,7 @@ jobs:
           name: pr-sizes
       - uses: actions/setup-node@v3
         with:
-          node-version: lts/*
+          node-version: '20'
           cache: 'yarn'
       - name: Install base dependencies
         run: yarn install --frozen-lockfile

.github/workflows/style-check.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: lts/*
+          node-version: '20'
           cache: 'yarn'
       - name: Install Dependencies
         run: yarn install --frozen-lockfile
@@ -42,7 +42,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: lts/*
+          node-version: '20'
           cache: 'yarn'
       - name: Install Dependencies
         run: yarn install --frozen-lockfile