Fix typo : intall to install (#2646)

Fixing a typo in installation doc.

frappe/docs/install.md

@@ -4,7 +4,7 @@
 
 Frappe Framework is based on the <a href="https://frappe.io">Frappe Framework</a>, a full stack web framework based on Python, MariaDB, Redis, Node.
 
-To intall Frappe Framework, you will have to install the <a href="https://github.com/frappe/bench">Frappe Bench</a>, the command-line, package manager and site manager for Frappe Framework. For more details, read the Bench README.
+To install Frappe Framework, you will have to install the <a href="https://github.com/frappe/bench">Frappe Bench</a>, the command-line, package manager and site manager for Frappe Framework. For more details, read the Bench README.
 
 After you have installed Frappe Bench, go to you bench folder, which is     `frappe.bench` by default and setup **frappe**.
 
@@ -27,4 +27,4 @@ To run this locally, run
 Fire up your browser and go to http://localhost:8000 and you should see the login screen. Login as **Administrator** and **admin** (or the password you set at the time of `new-site`) and you are set.
 
 <!-- jinja -->
-<!-- autodoc -->
+<!-- autodoc -->