Fix ABI cloud_phase composite recipe and enhancement

[yufeizhu600]

The current Eumetsat cloud phase composite in the abi.yaml config file seems not correct according to the recipe found on the Eumetsat website.

Also the link to the reference documentation in the cloud phase composite description is dead.
This PR has fixed the recipe in the enhancement and composite config files. Below is a sample of the cloud phase composite.

For the interpretation of the colours in the image, please refer to this Cloud Phase RGB Quick Guide

For comparison, here is a sample from the current implementation of the cloud phase composite recipe.

[codecov]

Codecov Report

Merging #1922 (510644f) into main (85656a8) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1922   +/-   ##
=======================================
  Coverage   93.41%   93.41%           
=======================================
  Files         275      275           
  Lines       40732    40738    +6     
=======================================
+ Hits        38048    38054    +6     
  Misses       2684     2684           

Flag	Coverage Δ
behaviourtests	4.83% <ø> (+0.01%)	⬆️
unittests	93.95% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
satpy/tests/reader_tests/test_vii_l2_nc.py	93.93% <0.00%> (-6.07%)	⬇️
satpy/tests/reader_tests/test_vii_l1b_nc.py	97.18% <0.00%> (-2.82%)	⬇️
satpy/tests/reader_tests/test_nwcsaf_msg.py	96.63% <0.00%> (-1.69%)	⬇️
satpy/tests/reader_tests/test_vii_base_nc.py	98.75% <0.00%> (-1.25%)	⬇️
satpy/tests/test_config.py	93.84% <0.00%> (-0.77%)	⬇️
satpy/resample.py	79.34% <0.00%> (-0.69%)	⬇️
satpy/modifiers/geometry.py	87.30% <0.00%> (-0.20%)	⬇️
satpy/modifiers/angles.py	96.64% <0.00%> (-0.07%)	⬇️
satpy/readers/ahi_hsd.py	97.25% <0.00%> (-0.05%)	⬇️
satpy/readers/fci_l1c_nc.py	97.93% <0.00%> (-0.05%)	⬇️
... and 4 more

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[coveralls]

Coverage remained the same at 93.901% when pulling 510644f on yufeizhu600:eum_cloud_phase_composite into 008b06d on pytroll:main.

[djhoese]

Wow, nice catch. Looks like the enhancement was never added at all. This looks good to me. The codebeat issues seem to be unrelated and probably due to you starting from an old main branch. I'll give others a chance to review this too, but otherwise I can merge this tomorrow if no one has anything else to say (remind me to merge this on slack if I forget).