chore: update action to use node20 (#240)

<!--  Thanks for sending a pull request! -->

#### What this PR does / why we need it:

Action fails to run since node16 deprecation

#### Which issue(s) does this PR fixes?:

<!--
(Optional) Automatically closes linked issue when PR is merged.
Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
-->

Fixes #239


#### Additional comments?:

I'm testing this change now.

Co-authored-by: Chisel <chisel@chizography.net>

action.yml

@@ -20,5 +20,5 @@ inputs:
     default: ${{ github.token }}
 
 runs:
-  using: 'node16'
+  using: 'node20'
   main: 'dist/index.js'