After some update, they all changed to none. Need to change to 'Media file'. Can I do it once and for all pictures in all articles?

I see in the text of article difference between images with Link To none and Media File:

<!-- Media File -->
<a href="... url ..."><img class="alignnone wp-image-936 size-full" src="... url ..." alt="Боракай" width="1000" height="586" /></a>

<!-- None -->
<img class="alignnone wp-image-936 size-full" src="... url ..." alt="Боракай" width="1000" height="586" />

So, it is an a tag. I suppose some regex applied to all articles would help.