update release note

Signed-off-by: Xiang Dai <764524258@qq.com>

tools/release-note.md

@@ -1,4 +1,4 @@
-This is release `${CIRCLE_TAG}` of Loki. 
+This is release `${CIRCLE_TAG}` of Loki.
 
 ### Notable changes:
 :warning: **ADD RELEASE NOTES HERE** :warning:
@@ -9,8 +9,8 @@ The components of Loki are currently distributed in plain binary form and as Doc
 #### Binary:
 ```bash
 # download a binary (adapt app, os and arch as needed)
-$ curl -fSL -o "/usr/local/bin/loki.gz" "https://github.com/grafana/loki/releases/download/${CIRCLE_TAG}/loki-linux-amd64.gz"
-$ gunzip "/usr/local/bin/loki.gz"
+$ curl -fSL -o "/usr/local/bin/loki.zip" "https://github.com/grafana/loki/releases/download/${CIRCLE_TAG}/loki-linux-amd64.zip"
+$ unzip "/usr/local/bin/loki.gz"
 
 # make sure it is executable
 $ chmod a+x "/usr/local/bin/loki"