Update quay.io/kiwigrid/k8s-sidecar Docker tag to v2.7.3

[vshn-renovate]

This PR contains the following updates:

Package	Update	Change
quay.io/kiwigrid/k8s-sidecar	minor	2.5.5 → 2.7.3

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Release Notes

kiwigrid/k8s-sidecar (quay.io/kiwigrid/k8s-sidecar)

v2.7.3

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v2.7.1

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🐛 Fixes

• Fix file deletes in SLEEP mode
  • PR: #​425

📦 Dependencies

• build(deps): bump docker/bake-action from 7.0.0 to 7.1.0
  • PR: #​559

v2.7.0

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v2.6.1

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🐛 Fixes

• fix: TypeError when insufficient privileges to create folder
  • PR: #​564

📦 Dependencies

• build(deps): bump mikepenz/release-changelog-builder-action from 6.1.0 to 6.2.1
  • PR: #​562
• build(deps): bump docker/build-push-action from 7.0.0 to 7.1.0
  • PR: #​560
• build(deps): bump github/codeql-action from 4.32.4 to 4.35.1
  • PR: #​561
• build(deps): bump docker/login-action from 3.7.0 to 4.1.0
  • PR: #​563

v2.6.0

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📦 Dependencies

• build(deps): bump python from 3.13.12-alpine3.23 to 3.14.3-alpine3.23
  • PR: #​555

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