“Links are not crawlable”

I found “Links are not crawlable” problem on Lighthouse, I fixed this problem by changing

>[<a
				id="footnote_reference_container_collapse_button_post_id_container_id"
			>+</a
			>]</span

to

>[<span
				id="footnote_reference_container_collapse_button_post_id_container_id"
			>+</span
			>]</span

from footnotes > templates > public > reference-container.html on line 50 – 53

If you think this codes will help other users so please implement this codes in future updates.
Implementing the codes to the plugin files also will help me to not modify plugin files again when new updates are coming.
Thank you.