chore: fix markdown linter errors

[mowies]

This PR

• adjusts some markdown-lint rules
• fixes lots and lots of linter errors

[codecov]

Codecov Report

Merging #824 (ec10a58) into main (6434be9) will decrease coverage by 0.08%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #824      +/-   ##
==========================================
- Coverage   58.61%   58.53%   -0.08%     
==========================================
  Files          97       97              
  Lines        7542     7542              
==========================================
- Hits         4421     4415       -6     
- Misses       2932     2936       +4     
- Partials      189      191       +2     

Impacted Files	Coverage Δ
...ptnworkloadinstance/reconcile_prepostevaluation.go	81.81% <0.00%> (-9.10%)	⬇️
...lers/lifecycle/keptnworkloadinstance/controller.go	81.61% <0.00%> (-1.35%)	⬇️

Flag	Coverage Δ
component-tests	41.71% <ø> (-0.68%)	⬇️
keptn-lifecycle-operator	54.67% <ø> (ø)
klt-cert-manager	67.50% <ø> (ø)
scheduler	21.17% <ø> (ø)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication