docs: "Glossary" page added

docs/users_guide/terms_and_definitions.md

@@ -4,6 +4,6 @@ The **mp-units** project consistently uses the official metrology vocabulary def
 the ISO and BIPM. Please familiarize yourself with those terms to better understand
 the documentation and improve domain-related communication and discussions.
 
-You can find essential project-related definitions in [our documentation's "Glossary" chapter](https://mpusz.github.io/mp-units/glossary.html).
+You can find essential project-related definitions in [our documentation's "Glossary" chapter](../../appendix/glossary).
 Even more, terms are provided in the official vocabulary of the [ISO](https://www.iso.org/obp/ui#iso:std:iso-iec:guide:99:ed-1:v2:en)
 and [BIPM](https://jcgm.bipm.org/vim/en).