(CAT-270) Adjusting expected Puppet/Ruby versions

During a PDK release, it was noticed that there were several failures
related to outdated Puppet/Ruby version expectations.

This commit aims to update those expectations so that the integration
tests look for the correct values.

package-testing/spec/package/version_selection_spec.rb

@@ -2,9 +2,12 @@
 
 describe 'Test puppet & ruby version selection' do
   module_name = 'version_selection'
+  # IMPORTANT: The following block should be updated with the latest version of each major release supported for the
+  # test cases to pass. If you are running integration testing prior to a release and its failing due to missing Puppet
+  # gems, verify that the following versions are correct.
   test_cases = [
-    { envvar: 'PDK_PUPPET_VERSION', version: '7.25.0', expected_puppet: '7.25.0', expected_ruby: '2.7.8' },
-    { envvar: 'PDK_PUPPET_VERSION', version: '8.1.0', expected_puppet: '8.1.0', expected_ruby: '3.2.2' }
+    { envvar: 'PDK_PUPPET_VERSION', version: '7.26.0', expected_puppet: '7.26.0', expected_ruby: '2.7.8' },
+    { envvar: 'PDK_PUPPET_VERSION', version: '8.2.0', expected_puppet: '8.2.0', expected_ruby: '3.2.2' }
   ]
 
   before(:all) do