DOCS: fix some sphinx warnings

[ghost]

This commit fixes various errors and warnings from sphinx, mostly due to
wrong indents.

[codecov-commenter]

Codecov Report

Merging #2065 (7f171df) into develop (ce7ebca) will decrease coverage by 0.01%.
The diff coverage is 22.92%.

@@             Coverage Diff             @@
##           develop    #2065      +/-   ##
===========================================
- Coverage    76.05%   76.04%   -0.02%     
===========================================
  Files          433      434       +1     
  Lines        23158    23218      +60     
  Branches      3095     3104       +9     
===========================================
+ Hits         17612    17655      +43     
- Misses        4839     4853      +14     
- Partials       707      710       +3     

Impacted Files	Coverage Δ
intelmq/bots/collectors/http/collector_http.py	59.61% <ø> (ø)
...elmq/bots/collectors/http/collector_http_stream.py	40.00% <ø> (ø)
intelmq/bots/collectors/misp/collector.py	41.86% <ø> (ø)
...s/collectors/shadowserver/collector_reports_api.py	89.28% <ø> (ø)
intelmq/bots/experts/http/expert_status.py	80.00% <ø> (ø)
intelmq/bots/experts/jinja/expert.py	39.39% <ø> (ø)
intelmq/bots/experts/splunk_saved_search/expert.py	20.75% <ø> (ø)
intelmq/bots/experts/tuency/expert.py	86.00% <ø> (ø)
intelmq/bots/outputs/elasticsearch/output.py	78.04% <ø> (ø)
intelmq/bots/outputs/misp/output_api.py	24.75% <ø> (ø)
... and 16 more