Bug: Invalid File Path in Repository Prevents Cloning on Windows

Hello Maintainers,

I encountered an issue when cloning the repository on a Windows machine. The clone operation failed during the checkout phase due to a file path containing characters/symbols that are invalid on the Windows (NTFS) file system.

**The problematic file path is:**
* `Responsive Navigation Bar /index.html`

The issue appears to be caused by the **trailing space** and/or the combination of the space and forward slash (` /`) in the folder name, which Windows rejects.

This issue prevents many potential Hacktoberfest contributors using Windows from successfully cloning the repository, making contributions difficult.

### **Suggested Fix:**
The folder should be renamed to remove the trailing space and special character.

* **Suggested New Path:** `Responsive-Navigation-Bar/index.html` (Replacing the spaces with hyphens is a common convention.)

I want to submit a Pull Request to fix this issue for **first PR to Hacktoberfest**.

Thank you!