chore(deps): update webdevops/azure-keyvault-exporter docker tag to v26

[renovate]

This PR contains the following updates:

Package	Update	Change
webdevops/azure-keyvault-exporter	major	24.9.1 → 26.1.0

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Release Notes

webdevops/azure-keyvault-exporter (webdevops/azure-keyvault-exporter)

v26.1.0

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• update deps
• fix wrong default log format in container
• fix multi-arch build (arm64 container image had amd64 binary)

v25.12.2

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• improve source log info (add -trimpath as buildopt)

v25.12.1

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• switch to golang 1.25.5 (instead of 1.25.0)

v25.12.0

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• switch to golang 1.25
• update dependencies
• switch from zap logging to slog
• added azcli container image

v25.5.0

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• switch to golang 1.24
• update dependencies
• add auto GOMAXPROCS limits

v25.2.0

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• update dependencies

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