Fixed PHP warning in template_parts.php

[girishpanchal30]

Summary

In this PR, I've fixed the PHP warning.

Test instructions

Please follow the test instructions provided in the issue description or use the code snippets below.

add_filter( 'neve_read_more_args', '__return_false', 99 );

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

Closes https://github.com/Codeinwp/neve-pro-addon/issues/2854

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