Update Helm release base to v0.2.8

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
base	patch	0.2.7 -> 0.2.8

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Release Notes

hmcts/chart-base (base)

### [`v0.2.8`](https://togithub.com/hmcts/chart-base/releases/tag/0.2.8): 🌈 [Compare Source](https://togithub.com/hmcts/chart-base/compare/0.2.7...0.2.8) ##### 💯 Major features - Workload identity is now supported in this release ##### 🧰 Maintenance - Updating renovate config [@​JordanHoey96](https://togithub.com/JordanHoey96) ([#​27](https://togithub.com/hmcts/chart-base/issues/27)) - Updating Endpoint [@​benjamin-v1](https://togithub.com/benjamin-v1) ([#​26](https://togithub.com/hmcts/chart-base/issues/26)) ##### 📦 Dependency updates - Update Helm release postgresql to v12.11.1 [@​renovate](https://togithub.com/renovate) ([#​25](https://togithub.com/hmcts/chart-base/issues/25)) - Update Helm release postgresql to v12.2.8 [@​renovate](https://togithub.com/renovate) ([#​19](https://togithub.com/hmcts/chart-base/issues/19)) - Update Helm release library to v2.0.14 [@​renovate](https://togithub.com/renovate) ([#​24](https://togithub.com/hmcts/chart-base/issues/24))

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