fix: correction of obsidian tags

[envico801]

Closes #551

Possible fix to the regex of OBS_TAG_REGEXP

With the new changes, it now detects chinese characters correctly.

[envico801]

An improved version of the regex could be this one:

const OBS_TAG_REGEXP = /#([\p{L}\p{N}\p{Emoji}\p{M}_/-]+)/gu;

Allowing to recognise characters from multiple languages and some others from the unicode family.

Detailed comment here