Bump node version to version 24 as 20 is deprecated

From github actions:

`Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: act10ns/slack@44541246747a30eb3102d87f7a4cc5471b0ffb7d. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026`

Thanks!