Move terraform-docs bin in a folder already in the Linux PATH

Signed-off-by: Florent Poinsaut <florent@poinsaut.fr>

README.md

@@ -46,7 +46,7 @@ binary for your platform from "Assets" and place this into your `$PATH`:
 curl -Lo ./terraform-docs.tar.gz https://github.com/terraform-docs/terraform-docs/releases/download/v0.16.0/terraform-docs-v0.16.0-$(uname)-amd64.tar.gz
 tar -xzf terraform-docs.tar.gz
 chmod +x terraform-docs
-mv terraform-docs /usr/local/terraform-docs
+mv terraform-docs /usr/local/bin/terraform-docs
 ```
 
 **NOTE:** Windows releases are in `ZIP` format.