chore(deps): update loki to v5.43.0 (#180)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [loki](https://grafana.github.io/helm-charts)
([source](https://togithub.com/grafana/helm-charts)) | minor | `5.42.2`
-> `5.43.0` |

---

### Release Notes

<details>
<summary>grafana/helm-charts (loki)</summary>

###
[`v5.43.0`](https://togithub.com/grafana/helm-charts/releases/tag/helm-loki-5.43.0)

Helm chart for Grafana Loki in simple, scalable mode

Source commit:
grafana/loki@6879788

Tag on source:
https://github.com/grafana/loki/releases/tag/helm-loki-5.43.0

###
[`v5.42.3`](https://togithub.com/grafana/helm-charts/releases/tag/helm-loki-5.42.3)

Helm chart for Grafana Loki in simple, scalable mode

Source commit:
grafana/loki@256f397

Tag on source:
https://github.com/grafana/loki/releases/tag/helm-loki-5.42.3

</details>

---

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src/loki/common/zarf.yaml

@@ -13,7 +13,7 @@ components:
         localPath: ../chart
       - name: loki
         url: https://grafana.github.io/helm-charts/
-        version: 5.42.2
+        version: 5.43.0
         namespace: loki
         valuesFiles:
           - ../values/values.yaml