ci: Replace Razbot with CFLbot

[faucomte97]

This change is 

[codecov]

Codecov Report

Merging #2244 (6580abd) into master (3d86dc6) will decrease coverage by 0.16%.
Report is 3 commits behind head on master.
The diff coverage is 100.00%.

❗ Current head 6580abd differs from pull request most recent head 7760b83. Consider uploading reports for the commit 7760b83 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2244      +/-   ##
==========================================
- Coverage   94.28%   94.13%   -0.16%     
==========================================
  Files         172      172              
  Lines        4605     4605              
==========================================
- Hits         4342     4335       -7     
- Misses        263      270       +7     

Files	Coverage Δ
portal/__init__.py	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

[SKairinos]

Reviewed 1 of 1 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @faucomte97)