Fix the LRS article draft

[multun]

It's broken, see:

• https://docs.oracle.com/en/database/oracle/oracle-database/19/spatl/lrs-linear-referencing-system-concepts.html
• http://blazek.github.io/lrs/release/help.0.3.5/index.html
• https://www.postgis.net/workshops/postgis-intro/linear_referencing.html Address = measure