chore(camel-test-infra-redis): upgrade redis.container to 7.4.9-alpine

[github-actions]

This PR updates the redis.container container image to version 7.4.9-alpine.

Update Details

• Property: redis.container
• Image: mirror.gcr.io/redis
• File: /home/runner/work/camel/camel/test-infra/camel-test-infra-redis/src/main/resources/org/apache/camel/test/infra/redis/services/container.properties
• Old version: 7.4.8-alpine
• New version: 7.4.9-alpine

Verification

Please verify:

• Container image version is compatible with existing tests
• No breaking changes in the updated version
• Tests pass with the new version

Run the following to rebuild the test infra:

mvn clean verify -pl camel-test-infra-redis

Then test the impacted components.

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This PR was automatically created by the Container Version Upgrade workflow.