Fix function call name token type in function_indexes method

[hsnodgrass]

Summary

Currently, the method function_indexes in lib/puppet-lint/data.rb doesn't work and only returns empty arrays. This is because, when iterating over the token array, tokens are skipped if their type does not equal :NAME but tokens that represent function call declarations have the type :FUNCTION_NAME and are skipped during iteration.

Additional Context

Steps to reproduce:

1. Create a basic puppet-lint plugin gem.
2. In a lib/puppet-lint/plugins/<what ever your plugin name is>.rb file, add require 'pry'; binding.pry as the first line in the plugin's #check method definition.
3. Create (or edit) the RSpec test for the plugin ensure that the :code block that your plugin test will execute against has a Puppet function call in it (i.e. notice('This is the func'))
4. Run RSpec. When the pry session starts, type function_indexes and see that it returns an empty array.

Checklist

• [ ] 🟢 Spec tests.
• [ ] 🟢 Acceptance tests.
• [x] Manually verified.

I didn't see any spec tests specific to this method so I didn't update any tests. Let me know if there are tests I should have updated for this.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.19%. Comparing base (66ed4a2) to head (0a278ac).

Files	Patch %	Lines
lib/puppet-lint/data.rb	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #198 +/- ## ======================================= Coverage 93.19% 93.19% ======================================= Files 55 55 Lines 1792 1792 ======================================= Hits 1670 1670 Misses 122 122 ```

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