Next & Previous post button

Hello,
I want to change the next and previous post button, but I’m not familiar with php code.
I found the code part which concern the next and previous button but I don’t know how to modify it. What I want is that the next and previous button only show the posts which are in the same category as the post you were reading.
Thanks for your help!

// Previous/next post navigation.
				the_post_navigation(
					array(
						'next_text' => '<span class="meta-nav" aria-hidden="true">' . __( 'Next Post', 'innovatory' ) . '</span> ' .
							'<span class="screen-reader-text">' . __( 'Next post:', 'innovatory' ) . '</span> <br/>' .
							'<span class="post-title">%title</span>',
						'prev_text' => '<span class="meta-nav" aria-hidden="true">' . __( 'Previous Post', 'innovatory' ) . '</span> ' .
							'<span class="screen-reader-text">' . __( 'Previous post:', 'innovatory' ) . '</span> <br/>' .
							'<span class="post-title">%title</span>',
					)
				);