Update ccsinje cost

[tabeado]

Purpose of this PR

Change the default cost for ccsinje to the medium estimate. This is the follow-up to PR 1592.

Type of change

• Minor change (default scenarios show only small differences)

Checklist:

• My code follows the coding etiquette
• I performed a self-review of my own code
• I explained my changes within the PR, particularly in hard-to-understand areas
• I checked that the in-code documentation is up-to-date
• I adjusted the reporting in remind2 where it was needed
• All automated model tests pass (FAIL 0 in the output of make test)
• The changelog CHANGELOG.md has been updated correctly

Further information (optional):

The overview shown in the REMIND meeting on March 7 as well as compare scenarios can be found here:
/home/tabeado/co2-transport-storage

[amerfort]

Thanks for taking care of this!