updated location of ModelSim gitignore file (#4479)
per
https://github.com/github/gitignore/commit/ca05a4dafd96ec7fe03b0aa5d284a4bebf0f59e9
this file has been moved
this is causing this error:
https://github.com/graphql/graphql-js/actions/runs/17255990646/job/48967789469?pr=4478:
```
Run git clone --depth 1 https://github.com/github/gitignore.git
git clone --depth 1 https://github.com/github/gitignore.git
rm gitignore/Global/ModelSim.gitignore
rm gitignore/Global/Images.gitignore
cat gitignore/Node.gitignore gitignore/Global/*.gitignore > all.gitignore
IGNORED_FILES=$(git ls-files --cached --ignored --exclude-from=all.gitignore)
if [[ "$IGNORED_FILES" != "" ]]; then
echo -e "::error::Please remove these files:\n$IGNORED_FILES" | sed -z 's/\n/%0A/g'
exit 1
fi
shell: /usr/bin/bash -e {0}
Cloning into 'gitignore'...
rm: cannot remove 'gitignore/Global/ModelSim.gitignore': No such file or directory
Error: Process completed with exit code 1.
```
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Co-authored-by: Jovi De Croock <decroockjovi@gmail.com>
