Bump to node24 (#17)

https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Signed-off-by: Wesley Hershberger <wesley.hershberger@canonical.com>

Author: MggMuggins

action.yml

@@ -20,5 +20,5 @@ inputs:
     description: 'Get linked issues from Pull Request number'
     required: false
 runs:
-  using: 'node16'
+  using: 'node24'
   main: 'dist/index.js'