Update Helm release thanos to v15.7.27

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
thanos (source)	patch	15.7.25 -> 15.7.27

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Release Notes

bitnami/charts (thanos)

### [`v15.7.27`](https://redirect.github.com/bitnami/charts/blob/HEAD/bitnami/thanos/CHANGELOG.md#15727-2024-10-02) - \[bitnami/thanos] Release 15.7.27 ([#​29720](https://redirect.github.com/bitnami/charts/pull/29720)) ### [`v15.7.26`](https://redirect.github.com/bitnami/charts/blob/HEAD/bitnami/thanos/CHANGELOG.md#small15726-2024-10-02-small) - \[bitnami/thanos] Fix serviceNames based on additionalHeadless ([#​29673](https://redirect.github.com/bitnami/charts/issues/29673)) ([418a890](https://redirect.github.com/bitnami/charts/commit/418a890c3210947ff9e1aa9d75ba0fb611681b45)), closes [#​29673](https://redirect.github.com/bitnami/charts/issues/29673)

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