fix(ci): rename pr-instructions scripts to .cjs so they load under type:module

[mvill025]

What changes did you make and why did you make them ?

The Add Pull Request Instructions workflow fails on every PR opened against development:

ReferenceError: module is not defined in ES module scope
This file is being treated as an ES module because it has a '.js' file extension
and '/home/runner/work/VRMS/VRMS/package.json' contains "type": "module".

The root package.json declares "type": "module" (re-added in f42f6fce, the ESM test-suite migration), which makes Node treat every .js file in the repo root tree as an ES module. The two helper scripts under github-actions/pr-instructions/ were missed by that migration and still use CommonJS module.exports / require, so actions/github-script's require('./github-actions/...') blows up before the script runs.

• Renamed create-instruction.js → create-instruction.cjs and post-comment.js → post-comment.cjs, which opts both files out of type: module and back into CommonJS.
• Updated the two require() paths in .github/workflows/pr-instructions.yml and .github/workflows/wr-pr-instructions.yml to match.

No logic changes — the rename is the entire fix.

How to test

Opening this PR exercises the workflow directly: Add Pull Request Instructions should now pass and the follow-up workflow_run job should post the checkout-instructions comment.

Verified locally that both files load as CommonJS and produce the expected output:

$ node -e "console.log(require('./github-actions/pr-instructions/create-instruction.cjs')({g:{},c:fakeCtx}))"
git checkout -b mvill025-fix/foo development
git pull https://github.com/mvill025/VRMS.git fix/foo

Notes for reviewers

cypress/plugins/index.js and cypress/support/index.js are CommonJS under the same root "type": "module" and will hit the identical error whenever Cypress is run. They are not touched here because no CI job currently runs them — worth a separate issue.

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

No user-facing changes — CI configuration only.

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