📝 Fix broken installation links in README

[HyperionBurn]

What

Two relative links in README.md point at tutorial/install.md. Relative links in a repository-root README resolve against the repository root, and there is no tutorial/ directory there, so both of these 404:

• README.md:57 — [activate the project environment and install completion](tutorial/install.md#activate-the-virtual-environment)
• README.md:59 — [installation guide](tutorial/install.md)

The install guide lives at docs/tutorial/install.md, so this prefixes both targets with docs/.

These are the only two .md links in the file; every other link is an absolute URL.

How this was verified

Checked against master (a5882de):

• There is no tutorial/ entry at the repository root; docs/tutorial/install.md does exist.

• Resolving both links against GitHub:

  404  <-  https://github.com/fastapi/typer/blob/master/tutorial/install.md
  200  <-  https://github.com/fastapi/typer/blob/master/docs/tutorial/install.md
  

• The anchor needs no change. docs/tutorial/install.md:38 is ## Activate the Virtual Environment, which slugifies to activate-the-virtual-environment, exactly what the link already asks for.

• Both links are ordinary prose paragraphs, not inside a fenced code block or an HTML comment, so they are rendered links on the repository front page.

• README.md is not part of the documentation site — mkdocs.yml builds the nav from docs/index.md onward — so these links are intended for GitHub itself, where they were broken.

• Checked that no open issue or PR already covers it.

Two lines changed.

[github-actions]

📝 Docs preview

Last commit 6fce814 at: https://36ea93f3.typertiangolo.pages.dev

[YuriiMotov]

Thanks for pointing to this, but it should be solved differently.

It's been already reported in #1862 (comment). We will fix it later.

Thank you!