fix(unpoller): do not use /metrics for probes (#8078)

**Description**
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Please include a summary of the change and which issue is fixed. Please
also include relevant motivation and context. List any dependencies that
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Using /metrics for probes causes metrics to be scraped. This makes
probes unnecessarily expensive and leads to more scrapes than expected
against the Unifi controller (especially if the Prometheus scrape
interval is significantly less than the liveness probe interval).

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [x] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list any relevant details
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Run `helm template . --debug` and check the probes path is `/`.

**📃 Notes:**
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**✔️ Checklist:**

- [x] ⚖️ My code follows the style guidelines of this project
- [x] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [x] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [x] ⬆️ I increased versions for any altered app according to semantic
versioning

charts/stable/unpoller/Chart.yaml

@@ -22,7 +22,7 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/unpoller
   - https://github.com/unifi-poller/unifi-poller
 type: application
-version: 6.0.4
+version: 6.0.5
 annotations:
   truecharts.org/catagories: |
     - metrics

charts/stable/unpoller/values.yaml

@@ -28,11 +28,11 @@ workload:
         main:
           probes:
             liveness:
-              path: /metrics
+              path: /
             readiness:
-              path: /metrics
+              path: /
             startup:
-              path: /metrics
+              path: /
           env:
             # UP_UNIFI_DEFAULT_URL: "https://127.0.0.1:8443"
             # UP_UNIFI_DEFAULT_USER: "unifipoller"