deps: update github.com/keptn/lifecycle-toolkit/klt-cert-manager digest to 88a54f9

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/keptn/lifecycle-toolkit/klt-cert-manager	require	digest	cba2de5 -> 88a54f9

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[codecov]

Codecov Report

Merging #1794 (1ebe093) into main (88a54f9) will decrease coverage by 0.03%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1794      +/-   ##
==========================================
- Coverage   83.52%   83.49%   -0.03%     
==========================================
  Files         132      132              
  Lines        8210     8210              
==========================================
- Hits         6857     6855       -2     
- Misses       1101     1103       +2     
  Partials      252      252              

see 2 files with indirect coverage changes

Flag	Coverage Δ
certificate-operator	68.55% <ø> (ø)
component-tests	59.01% <ø> (+0.20%)	⬆️
lifecycle-operator	84.91% <ø> (ø)
metrics-operator	83.02% <ø> (ø)
scheduler	32.12% <ø> (ø)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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