docs: Fix sentence fragment in installation.md

[melek]

Description

There was a sentence fragment in the Foundation CLI for Foundation 5 users callout. I've attempted to correct the grammar without changing the substance of the section.

No related issue. This is a minor documentation correction.

Motivation and Context

There was a sentence fragment that disrupted reading the docs.

Screenshots (if appropriate):

Types of changes

• Documentation
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing
  functionality to change)

Checklist (all required):

• I have read and follow the CONTRIBUTING document.
• There are no other pull request similar to this one.
• The pull request title is descriptive.
• The template is fully and correctly filled.
• The pull request targets the right branch (develop or develop-v...).
• My commits are correctly titled and contain all relevant information.
• My code follows the code style of this project.
• [NA] I have updated the documentation accordingly to my changes (if relevant).
• [NA] I have added tests to cover my changes (if relevant).
• [NA] All new and existing tests passed.

[ncoden]

Hi @melek 👋,

Thank you for your pull request. This comes from a bad copy/paste when working on #10847.

Your proposal is great, but I'll use the original phrases instead.

[melek]

Thanks! Did I submit this properly? I wasn't 100% sure and I haven't worked on Git much before, feedback appreciated.

[ncoden]

@melek You did everything correctly 👏.

Just one think: give your commit names a contextual name <type>: <description>. So for example: docs: fix Foundation 6 CLI uninstallation note phrasing.