Update Helm release thanos to v15.7.29

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
thanos (source)	patch	15.7.28 -> 15.7.29

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Release Notes

bitnami/charts (thanos)

### [`v15.7.29`](https://redirect.github.com/bitnami/charts/blob/HEAD/bitnami/thanos/CHANGELOG.md#15729-2024-10-14) - \[bitnami/thanos] Add customAutoScaling flag ([#​29849](https://redirect.github.com/bitnami/charts/pull/29849))

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