TBR fix broken link

Change-Id: I34820acca721c35b2ba3d2c58a5127f570e52120
diff --git a/installation.md b/installation.md
index 57edb46..ee069c4 100644
--- a/installation.md
+++ b/installation.md
@@ -141,4 +141,4 @@
 [brew]: http://brew.sh/
 [xcode]: https://developer.apple.com/xcode/download/
 [todos demo app]: https://github.com/vanadium/todos
-[Vanadium Chrome extension]: ../tools/vanadium-chrome-extension.md
+[Vanadium Chrome extension]: tools/vanadium-chrome-extension.md