[FR] Create labels only when files exist under it

[nununo]

First Steps

• [x] I've ensured that this feature request does not already exist by using the search issues feature
• [x] I've read the documentation (see the README)
• [x] I'm on the latest release of obsidian-list-modified

Describe the desired feature

Now that the files are divided into created/modified/deleted (which is great btw thanks!), only create each of these headers if there are files to be listed.

In days in which I didn't delete any file I don't need the "Deleted" header.

Possible alternatives

Delete those manually.

Additional info?

[franciskafieh]

Fixed in release 2.1.2