README+root: bump install link to latest version

Author: guggero

README.md

@@ -30,7 +30,7 @@ Example (make sure you always use the latest version!):
 
 ```shell
 $ cd /tmp
-$ wget -O chantools.tar.gz https://github.com/lightninglabs/chantools/releases/download/v0.10.7/chantools-linux-amd64-v0.10.7.tar.gz
+$ wget -O chantools.tar.gz https://github.com/lightninglabs/chantools/releases/download/v0.11.2/chantools-linux-amd64-v0.11.2.tar.gz
 $ tar -zxvf chantools.tar.gz
 $ sudo mv chantools-*/chantools /usr/local/bin/
 ```

cmd/chantools/root.go

@@ -27,8 +27,12 @@ import (
 
 const (
 	defaultAPIURL = "https://blockstream.info/api"
-	version       = "0.11.3"
-	na            = "n/a"
+
+	// version is the current version of the tool. It is set during build.
+	// NOTE: When changing this, please also update the version in the
+	// download link shown in the README.
+	version = "0.11.3"
+	na      = "n/a"
 
 	Commit = ""
 )