Slight tweak to WOMBATlite default parameters for ESM1.6

[pearseb]

Looking to improve the vertical distributions of BGC tracers by tweaking the sinking rates of detritus and phytoplankton linear mortality terms.

[access-hive-bot]

This issue has been mentioned on ACCESS Hive Community Forum. There might be relevant details there:

https://forum.access-hive.org.au/t/coordinating-development-threads-for-next-phase-of-control-experiment/4523/1