Fix typo: Window -> Windows in .gitattributes comment

[Dictionaryphile]

Summary

Fixed a typo in the .gitattributes file comment where "Window" was incorrectly used instead of "Windows" in the Docker for Windows reference.

This is a minor documentation fix that improves the accuracy of the comment explaining the purpose of the LF line endings for .sh scripts.

Fix #14969

Screenshots

Before	After
# to Windows(NTFS) file-system, by a user of Docker for Window.	# to Windows(NTFS) file-system, by a user of Docker for Windows.

Checklist

Important

Please review the checklist below before submitting your pull request.

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods