Steps to replicate the issue (include links if applicable):

• Try to fill sources from a Wikipedia page that contains bare URLs wrapped in <Ref></ref> tags (case sensitive)
• Example: on this diff https://en.wikipedia.org/w/index.php?title=Stephanie_Panozzo&oldid=1225622070 ReFill recognizes only 1 reference to be filled even though there are 5

What happens?:

• ReFill recognizes only URLs wrapped in <ref></ref> but not in <Ref></ref>

What should have happened instead?:

• They should have been recognized as well

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

• Wikipedia

Other information (browser name/version, screenshots, etc.):

• Chrome