chore(deps): update docker.io/eclipse-temurin docker tag to v26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker.io/eclipse-temurin	stage	major	21-jdk-alpine → 26-jdk-alpine

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Quality Gate failed

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[sonarqubecloud]

Quality Gate failed

Failed conditions
E Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

Catch issues before they fail your Quality Gate with our IDE extension SonarQube for IDE