Modifying unnecessary H2/H3 tags with Craft Theme

[Taaqz]

Hello !

I want to improve SEO of my website who is using Craft Theme.

Unfortunately, I've just realized that on the collections pages, many H2 tags are present but have no use for SEO.

So I'm trying to remove them or change them to H5/H6, for example.

Here are some examples of unnecessary tags:

<H2> Filter:
<H2> Sort by:
<H2> 1 product
<H2> Filter and sort
<H2> Filter
<H2> 1 product

I've just made some attempts to modify the page code, going through "main-collection-product-grid.liquid" and changing the H2s to H6s, but when I save, nothing happens. The H2s are still H2s, even after saving.

Why is this? Is there a solution?

Thanks