docs: fix tools information doc link

Change-Id: I9085d2c2fd5299eb199ec43c2299c5baba06580e
GitHub-Last-Rev: a376d21520
GitHub-Pull-Request: golang/vscode-go#3309
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/575897
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Auto-Submit: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
kokoro-CI: kokoro <noreply+kokoro@google.com>
Commit-Queue: Hyang-Ah Hana Kim <hyangah@gmail.com>

docs/tools.md

@@ -2,7 +2,7 @@
 
 This document describes the tools that power the VS Code Go extension.
 
-Tools will be installed by default when you install the extension. You can also manually install or update all of these tools by running the [`Go: Install/Update Tools`](commands.md#go-installupdate-tools) command. The extension uses pinned versions of command-line tools. See the pinned versions in tools information [here](https://github.com/golang/vscode-go/blob/master/src/goToolsInformation.ts). If any tools are missing, you will see an `Analysis Tools Missing` warning in the bottom-right corner of the editor, which will prompt you to install these tools.
+Tools will be installed by default when you install the extension. You can also manually install or update all of these tools by running the [`Go: Install/Update Tools`](commands.md#go-installupdate-tools) command. The extension uses pinned versions of command-line tools. See the pinned versions in tools information [here](https://github.com/golang/vscode-go/blob/master/extension/src/goToolsInformation.ts). If any tools are missing, you will see an `Analysis Tools Missing` warning in the bottom-right corner of the editor, which will prompt you to install these tools.
 
 VS Code Go will install the tools to your `$GOPATH/bin` by default.