Update installations.md

[SKSMJ10]

Because

I saw that there is no note to suggest enabling virtualization or how to handle virtualization error for WSL2 unlike in VM section of this chapter. So, I decided to add one detailing how to fix it.

This PR

• Added a tip to handle virtualization error that one may encounter during WSL2 installation in step 1 of WSL2 installation section.(it's stated in VM section but not in WSL2).

Issue

Closes #XXXXX

Additional Information

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
• The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• If any lesson files are included in this PR, they follow the Layout Style Guide