Modifying Date Format

Hello!

I would like to remove the comma from the post date format. I found a support thread that suggests creating a child theme, pasting the content from content.php into it, and replacing line 22
from
<p class=”post-date”><?php the_time(‘j M, Y’); ?></p>
to
<p class=”post-date”><?php the_time(‘j M Y’); ?></p>.

I’ve tried this, but the date does not change. Can someone tell me what I might be doing wrong?

Thank you!