docs: update docs for pinned command-line tools

Change-Id: I95e412bc79ca393f09f32edf43955c0fc83ee07e
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/438635
Run-TryBot: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/docs/advanced.md b/docs/advanced.md
index 99136a3..a2c0ba0 100644
--- a/docs/advanced.md
+++ b/docs/advanced.md
@@ -61,6 +61,11 @@
 extension to use different tool location, for example a wrapper with a different
 name.
 
+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).
+To use an alternate version of a tool install it manually with with go install.
+
 ## Using a custom linter
 
 A commonly customized feature is the linter, which is the tool used to provide
diff --git a/docs/tools.md b/docs/tools.md
index a866e97..4bcc376 100644
--- a/docs/tools.md
+++ b/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. 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/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.