deps: update sigstore/cosign-installer action to v3.1.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
sigstore/cosign-installer	action	minor	v3.0.5 -> v3.1.0

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Release Notes

sigstore/cosign-installer (sigstore/cosign-installer)

v3.1.0

Compare Source

What's Changed

• update job to use latest action release by @​cpanato in https://github.com/sigstore/cosign-installer/pull/130
• Update action example for keyless signing as xarg is not required by @​jbtrystram in https://github.com/sigstore/cosign-installer/pull/132
• update examples by @​cpanato in https://github.com/sigstore/cosign-installer/pull/133
• bump cosign to default to release v2.1.0 and update docs by @​cpanato in https://github.com/sigstore/cosign-installer/pull/136

New Contributors

• @​jbtrystram made their first contribution in https://github.com/sigstore/cosign-installer/pull/132

Full Changelog: sigstore/cosign-installer@v3.0.5...v3.1.0

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[codecov]

Codecov Report

Merging #1627 (a00c1aa) into main (6eac2bf) will increase coverage by 3.80%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1627      +/-   ##
==========================================
+ Coverage   59.50%   63.30%   +3.80%     
==========================================
  Files         120      142      +22     
  Lines        9610    10822    +1212     
==========================================
+ Hits         5718     6851    +1133     
- Misses       3709     3713       +4     
- Partials      183      258      +75     

see 47 files with indirect coverage changes

Flag	Coverage Δ
certificate-operator	68.55% <ø> (?)
component-tests	58.49% <ø> (-0.27%)	⬇️
lifecycle-operator	84.48% <ø> (?)
metrics-operator	82.31% <ø> (ø)
scheduler	30.45% <ø> (ø)

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