Update BSK path

[samsymons]

Task: https://app.asana.com/0/414235014887631/1209745503606409/f

This PR updates the BSK path to account for the changes in duckduckgo/apple-browsers#304, where BSK is being moved into a SharedPackages directory, allowing us to create other shared packages.

This repo is being updated to look for all changes in the SharedPackages directory, so that any new packages that are added will be included by default.

How to test:

1. Check that CI is green
2. Check that there are no other changes that need to be made to support the changes in Create SharedPackages directory apple-browsers#304

[ayoy]

LGTM! Remember to bump the patch component in version.rb

[ayoy]

@samsymons What I meant was to update ./lib/fastlane/plugin/ddg_apple_automation/version.rb with the bumped version (the tag you would make after merging this PR) before merging. Now the 2.2.2 release in github identifies itself as 2.2.1. But actually it doesn’t seem to be breaking anything 😅 Anyway, let’s keep this in mind for the future.