docs(glossary): add context to untranslatable terms

Recovered from closed #593.

Signed-off-by: Alessandro De Blasis <alex@deblasis.net>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: deblasis

GLOSSARY.md

@@ -30,6 +30,7 @@ Glossary of the translations of technical and React-specific terms.
 - wrapper
 - provider
 - consumer
+- context
 - reducer
 
 # Common Translations