Fixup: url to access promtail config sample

[nek-00-ken]

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Checklist

• Documentation added
• Tests updated

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Merging #2597 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2597      +/-   ##
==========================================
- Coverage   63.03%   62.97%   -0.06%     
==========================================
  Files         169      169              
  Lines       15015    15015              
==========================================
- Hits         9464     9456       -8     
- Misses       4792     4804      +12     
+ Partials      759      755       -4     

Impacted Files	Coverage Δ
pkg/promtail/positions/positions.go	46.49% <0.00%> (-13.16%)	⬇️
pkg/promtail/targets/file/tailer.go	72.91% <0.00%> (+2.08%)	⬆️
pkg/promtail/targets/file/filetarget.go	69.14% <0.00%> (+2.85%)	⬆️

[slim-bean]

LGTM! Thanks!

[slim-bean]

Looks like you need to sign the CLA still, (or if you did it usually goes wrong because the email on your git commit doesn't match the email you use in github, if this is the case usually the easiest fix is to modify the author email on the existing commit and force push to the branch)

[nek-00-ken]

Hi, I ament the commit, thanks for the advice about the mail, I didn't know about it ! CLA approved ;)
@slim-bean : You're welcome ! anybody who uses the stack and the provided documentation should have fix this for a while... :P

[slim-bean]

Thanks @nek-00-ken!