Chore: Update action to use node 20

[MauriceArikoglu]

Fixes #1230

[github-actions]

output of yarn all

yarn run v1.22.21
$ yarn build && yarn format && yarn lint && yarn package && yarn test
$ tsc
$ prettier --write **/*.ts
__tests__/comment.test.ts 258ms (unchanged)
__tests__/config.test.ts 78ms (unchanged)
src/comment.ts 42ms (unchanged)
src/config.ts 29ms (unchanged)
src/main.ts 15ms (unchanged)
$ eslint src/**/*.ts
$ ncc build --source-map --license licenses.txt
ncc: Version 0.38.1
ncc: Compiling file index.js into CJS
  37kB  dist/licenses.txt
  40kB  dist/sourcemap-register.js
1130kB  dist/index.js
1315kB  dist/index.js.map
1315kB  dist/index.js.map
2522kB  [2040ms] - ncc 0.38.1
$ jest
::debug::followSymbolicLinks 'false'
::debug::matchDirectories 'false'
::debug::followSymbolicLinks 'false'
::debug::implicitDescendants 'true'
::debug::matchDirectories 'false'
::debug::omitBrokenSymbolicLinks 'true'
::debug::Search path '/home/runner/work/sticky-pull-request-comment/sticky-pull-request-comment/__tests__/assets/result'
::debug::followSymbolicLinks 'false'
::debug::matchDirectories 'false'
::debug::followSymbolicLinks 'false'
::debug::implicitDescendants 'true'
::debug::matchDirectories 'false'
::debug::omitBrokenSymbolicLinks 'true'
::debug::Search path '/home/runner/work/sticky-pull-request-comment/sticky-pull-request-comment/__tests__/assets'
::debug::followSymbolicLinks 'false'
::debug::matchDirectories 'false'
::debug::followSymbolicLinks 'false'
::debug::implicitDescendants 'true'
::debug::matchDirectories 'false'
::debug::omitBrokenSymbolicLinks 'true'
::debug::Search path '/home/runner/work/sticky-pull-request-comment/sticky-pull-request-comment/__tests__/assets/not_exists'
Done in 19.18s.

The build is over.

[landsman]

Thanks!

@marocchino can you please approve it?

[marocchino]

It released as v2.9.0.