update readme badge and install instruction

Author: vjdhama

README.md

@@ -1,6 +1,6 @@
 # infraspec.dev
 
-![GitHub Action Lint](https://github.com/infraspecdev/infraspec.dev/actions/workflows/lint.yml/badge.svg?event=push)
+![GitHub Action Lint](https://github.com/infraspecdev/infraspec.dev/actions/workflows/lint.yml/badge.svg?branch=main)
 
 ## Getting Started
 
@@ -10,6 +10,12 @@ To run this website locally, you will need to have the following software instal
 
 - [Hugo](https://gohugo.io/getting-started/installing/)
 
+If you're using MacOS and [Homebrew](https://brew.sh/), you can install Hugo using the following command:
+
+```bash
+brew install hugo
+```
+
 ### Running the website locally
 
 1. Clone the repository: `git clone https://github.com/infraspecdev/infraspec.dev.git`