Use Node 24

Node 20 is deprecated and will stop working in June
https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Author: gruenich

codespell-problem-matcher/action.yml

@@ -2,7 +2,7 @@ name: 'codespell problem matcher'
 author: 'Peter Newman'
 description: 'Shows codespell errors as annotation (with file and code line) in GitHub Actions'
 runs:
-  using: 'node20'
+  using: 'node24'
   main: 'index.js'
 branding:
   icon: 'search'