chore: Add node.js v24 to CI build matrix (#9219)

Node.js v24 has now been released, so add it to our build matrix.

Node v18 is no longer in LTS but we want to continue to test on
it until it is removed from package.json engines.

Author: cpcallen

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
         # TODO (#2114): re-enable osx build.
         # os: [ubuntu-latest, macos-latest]
         os: [ubuntu-latest]
-        node-version: [18.x, 20.x, 22.x]
+        node-version: [18.x, 20.x, 22.x, 24.x]
         # See supported Node.js release schedule at
         # https://nodejs.org/en/about/releases/