editors/tp-note: update to 1.21.14

Fix a minor regression when the title contains only sort-tag characters.

This release fixes a minor regression introduced with Tp-Note v1.21.10: Note
files, created with title fields containing only sort tag characters, need an
'extra_separator' between in the sort-tag and the title in their filename.
Failing this rule caused cyclic filename change when synchronizing the note's
metadata and the filename. Now, an extra-separator is correctly inserted
as before.

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