chore: add missing metadata back into docs page (#5682)

I accidentally removed this in my last PR, and it's causing a build error *By submitting this pull request, I confirm that my contribution is made under the terms of the [Wing Cloud Contribution License](https://github.com/winglang/wing/blob/main/CONTRIBUTION_LICENSE.md)*.
winglang · Feb 12, 2024 · 0911d09 · 0911d09
1 parent 481a0e8
commit 0911d09
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/docs/docs/01-start-here/02-installation.md b/docs/docs/01-start-here/02-installation.md
@@ -2,6 +2,7 @@
 id: installation
 title: Installation
 keywords: [Wing installation, installation, Wing toolchain]
+slug: /
 ---
 
 ## Prerequisite