deps: update dependency pyyaml to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pyyaml (source)	==5.4.1 -> ==6.0

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Release Notes

yaml/pyyaml

v6.0

Compare Source

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[sonarcloud]

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[codecov]

Codecov Report

Merging #648 (d2cf000) into main (09b0985) will increase coverage by 0.04%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #648      +/-   ##
==========================================
+ Coverage   54.71%   54.75%   +0.04%     
==========================================
  Files          78       78              
  Lines        6516     6516              
==========================================
+ Hits         3565     3568       +3     
+ Misses       2800     2798       -2     
+ Partials      151      150       -1     

Impacted Files	Coverage Δ
...ator/controllers/lifecycle/keptntask/controller.go	57.30% <0.00%> (+3.37%)	⬆️

Flag	Coverage Δ
component-tests	53.38% <ø> (+0.43%)	⬆️
keptn-cert-manager	67.56% <ø> (ø)
keptn-lifecycle-operator	52.13% <ø> (ø)
scheduler	21.17% <ø> (ø)

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