chore(deps): update helm release loki to v6.29.0

This PR contains the following updates: | Package | Update | Change | |---|---|---| | [loki](https://grafana.github.io/helm-charts) ([source](https://redirect.github.com/grafana/helm-charts)) | minor | `6.28.0` -> `6.29.0` | --- ### Release Notes <details> <summary>grafana/helm-charts (loki)</summary> ### [`v6.29.0`](https://redirect.github.com/grafana/helm-charts/releases/tag/grafana-6.29.0) The leading tool for querying and visualizing time series and metrics. </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/samcday/home-cluster). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMDcuMSIsInVwZGF0ZWRJblZlciI6IjM5LjIwNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->