chore: Update GitHub Actions workflows to use Node 24

PiperOrigin-RevId: 944035488

Author: sararob

.github/workflows/presubmit.yaml

@@ -8,7 +8,10 @@ jobs:
       matrix:
         node: [20, 22, 24]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node }}
       - uses: pnpm/action-setup@v2
         with:
           version: ^6.24.1

.kokoro/test.sh

@@ -39,7 +39,7 @@ npm test
 
 # codecov combines coverage across integration and unit tests. Include
 # the logic below for any environment you wish to collect coverage for:
-COVERAGE_NODE=22
+COVERAGE_NODE=24
 if npx check-node-version@3.3.0 --silent --node $COVERAGE_NODE; then
   NYC_BIN=./node_modules/nyc/bin/nyc.js
   if [ -f "$NYC_BIN" ]; then