chore(deps): update ollama to v0.20.0 (#5420)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ollama/ollama](https://github.com/ollama/ollama) | minor | `0.19.0` → `0.20.0` |
| ollama/ollama | minor | `0.19.0` → `0.20.0` |

---

### Release Notes

<details>
<summary>ollama/ollama (ollama/ollama)</summary>

### [`v0.20.0`](https://github.com/ollama/ollama/releases/tag/v0.20.0)

[Compare Source](https://github.com/ollama/ollama/compare/v0.19.0...v0.20.0)

<img width="3748" height="1290" alt="Gemma 4" src="https://github.com/user-attachments/assets/c4727579-47b1-4c7b-8aa2-28eda15b71f5" />

#### Gemma 4

**Effective 2B (E2B)**

```
ollama run gemma4:e2b
```

**Effective 4B (E4B)**

```
ollama run gemma4:e4b
```

**26B (Mixture of Experts model with 4B active parameters)**

```
ollama run gemma4:26b
```

**31B (Dense)**

```
ollama run gemma4:31b
```

#### What's Changed

- docs: update pi docs by [@&#8203;ParthSareen](https://github.com/ParthSareen) in [#&#8203;15152](https://github.com/ollama/ollama/pull/15152)
- mlx: respect tokenizer add\_bos\_token setting in pipeline by [@&#8203;dhiltgen](https://github.com/dhiltgen) in [#&#8203;15185](https://github.com/ollama/ollama/pull/15185)
- tokenizer: add SentencePiece-style BPE support by [@&#8203;dhiltgen](https://github.com/dhiltgen) in [#&#8203;15162](https://github.com/ollama/ollama/pull/15162)

**Full Changelog**: <https://github.com/ollama/ollama/compare/v0.19.0...v0.20.0-rc0>

</details>

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---

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---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #5420
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Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/ollama/Chart.yaml

@@ -31,4 +31,4 @@ dependencies:
     repository: oci://harbor.alexlebens.net/helm-charts
 icon: https://cdn.jsdelivr.net/gh/selfhst/icons/png/ollama.png
 # renovate: datasource=github-releases depName=ollama/ollama
-appVersion: 0.19.0
+appVersion: 0.20.0

clusters/cl01tl/helm/ollama/values.yaml

@@ -22,7 +22,7 @@ ollama:
         main:
           image:
             repository: ollama/ollama
-            tag: 0.19.0
+            tag: 0.20.0
             pullPolicy: IfNotPresent
           env:
             - name: OLLAMA_KEEP_ALIVE
@@ -58,7 +58,7 @@ ollama:
         main:
           image:
             repository: ollama/ollama
-            tag: 0.19.0
+            tag: 0.20.0
             pullPolicy: IfNotPresent
           env:
             - name: OLLAMA_KEEP_ALIVE
@@ -94,7 +94,7 @@ ollama:
         main:
           image:
             repository: ollama/ollama
-            tag: 0.19.0
+            tag: 0.20.0
             pullPolicy: IfNotPresent
           env:
             - name: OLLAMA_KEEP_ALIVE