[BUG] Spurious changes in ./bin/utils/export_docs_generators.sh output on Windows

Bug Report Checklist

• [ X ] Have you provided a full/minimal spec to reproduce the issue?
• [ N/A ] Have you validated the input using an OpenAPI validator (example)?
• [ X ] Have you tested with the latest master to confirm the issue still exists?
• [ X ] Have you searched for related issues/PRs?
• [ X ] What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

running the steps required as part of the PR template generates a bunch of junk on Windows, from / vs \ filepath differences

openapi-generator version

master branch

Generation Details

running the steps required as part of the PR template

Steps to reproduce

1. Open git-bash on Windows
2. git checkout master && git reset --hard && git clean -fdx to make sure you don't have any junk in your local repo
3. ./mvnw clean package
4. ./bin/utils/export_docs_generators.sh to generate the samples
5. git diff to see the unwanted changes.

Expected output: nothing in the diff
Actual output: very long, containing a lot of spurious changes. See attached
tmp.txt

Start with bin/utils/export_docs_generators.sh and reproduce the issue in Git Bash on Windows using the listed clean, build, and export commands. Inspect how the script handles file paths, then run git diff to verify that the export produces no spurious changes compared with a clean checkout.