[skip-changelog] Try to whitelist CI for Cloudflare spam-check filters

[cmaglie]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• The PR follows
  our contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)

What kind of change does this PR introduce?
Add a secret token to the User Agent to bypass Cloudflare spam-check filters

[codecov]

Codecov Report

Merging #1796 (696e625) into master (6ac5f7a) will increase coverage by 0.00%.
The diff coverage is 57.14%.

@@           Coverage Diff           @@
##           master    #1796   +/-   ##
=======================================
  Coverage   35.70%   35.70%           
=======================================
  Files         231      231           
  Lines       19463    19468    +5     
=======================================
+ Hits         6950     6952    +2     
- Misses      11695    11697    +2     
- Partials      818      819    +1     

Flag	Coverage Δ
unit	35.70% <57.14%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
configuration/network.go	51.51% <57.14%> (-2.06%)	⬇️

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[cmaglie]

I've got confirmation that the token is passing through.