granted: fix missing assume binary

Granted requires both 'granted' and 'assume' binaries to function.
The assume script exports AWS credentials to the parent shell.

Closes #249904

Author: emmanuel.john

Formula/g/granted.rb

@@ -20,6 +20,9 @@ class Granted < Formula
   def install
     ldflags = "-s -w -X github.com/common-fate/granted/internal/build.Version=#{version}"
     system "go", "build", *std_go_args(ldflags:), "./cmd/granted"
+    bin.install_symlink "granted" => "assumego"
+    bin.install "scripts/assume"
+    bin.install "scripts/assume.fish"
   end
 
   test do