Prevent permissions error on rancher plist file (#101)

Fixes:
```
Failed to load the deployment profile
Error reading file /Users/kevin.maldonado/Library/Preferences/io.rancherdesktop.profile.defaults.plist: Error: EACCES: permission denied, open '/Users/kevin.maldonado/Library/Preferences/io.rancherdesktop.profile.defaults.plist'
```

VERSION

@@ -1 +1 @@
-0.1.60
+0.1.61

formula/ih-core.rb

@@ -1,5 +1,5 @@
 class IhCore < Formula
-  VERSION="0.1.60"
+  VERSION="0.1.61"
   desc "Brew formula for installing core tools used at Included Health engineering."
   homepage "https://github.com/ConsultingMD/homebrew-ih-public"
   license "CC BY-NC-ND 4.0"

lib/core/rancher/step.sh

@@ -123,6 +123,8 @@ function ih::setup::core.rancher::install() {
   echo "A configuration file for Rancher Desktop will be copied to your system"
   echo "You may be required to enter your password"
   sudo cp "$TEMP_PLIST_DST" "$PLIST_DST"
+  sudo chown $USER:staff "$PLIST_DST"
+  sudo chmod 644 "$PLIST_DST"
 
   # Check if Rancher was installed manually
   brew list rancher >/dev/null 2>&1