Docs: Changelog: fix indentation and add helm repo url

[slim-bean]

No description provided.

[sandeepsukhani]

LGTM

[codecov-io]

Codecov Report

Merging #3102 (609b007) into master (0224881) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3102      +/-   ##
==========================================
+ Coverage   62.85%   62.88%   +0.03%     
==========================================
  Files         186      186              
  Lines       15949    15949              
==========================================
+ Hits        10024    10030       +6     
+ Misses       4997     4988       -9     
- Partials      928      931       +3     

Impacted Files	Coverage Δ
pkg/querier/queryrange/limits.go	91.66% <0.00%> (-4.17%)	⬇️
pkg/querier/queryrange/downstreamer.go	95.29% <0.00%> (-2.36%)	⬇️
pkg/promtail/targets/file/filetarget.go	64.33% <0.00%> (-2.10%)	⬇️
pkg/logql/evaluator.go	90.23% <0.00%> (+0.35%)	⬆️
pkg/promtail/positions/positions.go	58.51% <0.00%> (+11.70%)	⬆️