Fix trailing whitespace in folder path to resolve Windows cloning crash

[best-ed]

Description

Fixed a file-naming syntax bug in the repository structure. The folder name Responsive Navigation Bar contained a trailing whitespace before the forward slash (Responsive Navigation Bar /index.html).

Windows file systems strictly forbid trailing whitespaces in folder paths. Because of this validation rule, any Windows user attempting to download, pull, or clone this repository faces a fatal crash error during the git checkout phase, rendering the clone incomplete. Removing the trailing space allows the repository to clone smoothly on all Windows devices without custom local Git configurations.

Checklist

• I've been assigned an issue related to this PR.
• I've used beautifiers.
• I've added my Project's name and description to Index.md
• I've made a README.md file for my Project.
• The README.md file of my projrct contains Project title, Description, Use of project, Set up, Stack used and Output (Screenshots).

Related Issues or Pull Requests number

None (Independent cross-platform compatibility bug fix).