docs(billing): add info about resellers

[scaleway-bot]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 56.51%. Comparing base (5bf53e0) to head (3d9738c).
Report is 526 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/namespaces/billing/v2beta1/billing_cli.go	0.00%	5 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (5bf53e0) and HEAD (3d9738c). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (5bf53e0)	HEAD (3d9738c)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #4570       +/-   ##
===========================================
- Coverage   75.45%   56.51%   -18.94%     
===========================================
  Files         202      299       +97     
  Lines       44323    67774    +23451     
===========================================
+ Hits        33444    38304     +4860     
- Misses       9653    28076    +18423     
- Partials     1226     1394      +168     

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