Update fluentd docs and fixes links for the website.

[cyriltovena]

Signed-off-by: Cyril Tovena cyril.tovena@gmail.com

Fixes some mistakes found in the documentation for fluentd

[codecov-commenter]

Codecov Report

Merging #2391 into master will decrease coverage by 0.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2391      +/-   ##
==========================================
- Coverage   61.72%   61.61%   -0.12%     
==========================================
  Files         160      160              
  Lines       13577    13577              
==========================================
- Hits         8381     8365      -16     
- Misses       4569     4588      +19     
+ Partials      627      624       -3     

Impacted Files	Coverage Δ
pkg/logql/vector.go	68.75% <0.00%> (-18.75%)	⬇️
pkg/promtail/positions/positions.go	47.32% <0.00%> (-13.40%)	⬇️
pkg/logql/evaluator.go	92.47% <0.00%> (-0.41%)	⬇️
pkg/promtail/targets/file/filetarget.go	70.48% <0.00%> (+1.80%)	⬆️
pkg/querier/queryrange/downstreamer.go	97.93% <0.00%> (+2.06%)	⬆️
pkg/promtail/targets/file/tailer.go	76.13% <0.00%> (+2.27%)	⬆️

[owen-d]

lgtm