Remove leading white space in flag_meanings entry in fci_l2_nc.yaml

[strandgren]

This PR removes a trailing white space in one of the flag_meanings entries for one of the EUM-internal datasets (cloud mask test results) in the fci_l2_nc reader.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.10%. Comparing base (5984c29) to head (9d432ab).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3029   +/-   ##
=======================================
  Coverage   96.10%   96.10%           
=======================================
  Files         377      377           
  Lines       55163    55163           
=======================================
  Hits        53012    53012           
  Misses       2151     2151           

Flag	Coverage Δ
behaviourtests	3.94% <ø> (ø)
unittests	96.19% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[coveralls]

Pull Request Test Coverage Report for Build 12748635149

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 96.206%

---

Totals
Change from base Build 12572361608:	0.01%
Covered Lines:	53256
Relevant Lines:	55356

---

💛 - Coveralls

[mraspaud]

LGTM