Update installation instructions for Homebrew to include repository URL

Author: andrew

Formula/git-pkgs.rb

@@ -9,7 +9,8 @@ class GitPkgs < Formula
 
   def install
     ENV["GEM_HOME"] = libexec
-    system "bundle", "install", "--without", "development"
+    system "bundle", "config", "set", "--local", "without", "development"
+    system "bundle", "install"
     system "gem", "build", "git-pkgs.gemspec"
     system "gem", "install", "--ignore-dependencies", "git-pkgs-#{version}.gem"
     bin.install libexec/"bin/git-pkgs"

README.md

@@ -13,7 +13,7 @@ It works across many ecosystems (Gemfile, package.json, Dockerfile, GitHub Actio
 ## Installation
 
 ```bash
-brew tap andrew/git-pkgs
+brew tap andrew/git-pkgs https://github.com/andrew/git-pkgs
 brew install git-pkgs
 ```