Added note about possible need for sudo (#295)

Moved the mv part of command to separate line to make it more clear.

Author: JKrag

docs/installation.md

@@ -1,7 +1,7 @@
 # Installation
 
 git-phlow is available on:
-- Linux 
+- Linux
 - Windows
 - macOS
 
@@ -24,7 +24,15 @@ brew upgrade git-phlow
 Install git-phlow by running the following commands. This will download git-phlow from the GitHub releases, extract it and move in to the /usr/local/bin directory, and enable you to run `git phlow` in the terminal. Remember to use the latest release.
 
 ```shell
-wget https://github.com/Praqma/git-phlow/releases/download/v3.8.2/git-phlow-3.8.2-linux-amd64.tar.gz && tar -xzf git-phlow-3.8.2-linux-amd64.tar.gz && mv git-phlow /usr/local/bin
+wget https://github.com/Praqma/git-phlow/releases/download/v3.8.2/git-phlow-3.8.2-linux-amd64.tar.gz && tar -xzf git-phlow-3.8.2-linux-amd64.tar.gz
+
+mv git-phlow /usr/local/bin
+```
+
+You may need to run the last command with sudo, depending on your setup:
+
+```
+sudo mv git-phlow /usr/local/bin
 ```
 
 ### Windows