README: re-phrase text to have the style as vlkb-soda

README.md

@@ -4,7 +4,7 @@ is a web-application to discover astronomical data (supports FITS-files) and des
 It implements IVOA recommendation [SIA version 2](https://ivoa.net/documents/SIA) with optional VLKB-specific features:
 
 - provides overlap code
-- the filtering paramters (POS, BAND) can be given in GALACTIC and VELO-LSRK-km/s coordinates systems
+- the filtering paramters (POS, BAND) can be given in GALACTIC and VELO-LSRK [km/s] coordinates systems
 
 When used with [**vlkb-soda**](https://ict.inaf.it/gitlab/ViaLactea/vlkb-soda) they provide complete data-discovery and access solution.