chore(deps): update api-diff-baseline to v1.8.0 (#2217)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
|
[io.prometheus:prometheus-metrics-core](https://redirect.github.com/prometheus/client_java)
| `1.7.0` → `1.8.0` |
![age](https://developer.mend.io/api/mc/badges/age/maven/io.prometheus:prometheus-metrics-core/1.8.0?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/io.prometheus:prometheus-metrics-core/1.7.0/1.8.0?slim=true)
|

---

### Release Notes

<details>
<summary>prometheus/client_java
(io.prometheus:prometheus-metrics-core)</summary>

###
[`v1.8.0`](https://redirect.github.com/prometheus/client_java/blob/HEAD/CHANGELOG.md#180-2026-06-11)

[Compare
Source](https://redirect.github.com/prometheus/client_java/compare/v1.7.0...v1.8.0)

##### Features

- Add custom labels to exemplars
([#&#8203;2191](https://redirect.github.com/prometheus/client_java/issues/2191))
([fd1f3e8](https://redirect.github.com/prometheus/client_java/commit/fd1f3e85177ec4d4e4922f22f3aa79dc2dd7e17e))
- add MetricMetadata.Builder, deprecate wide constructors
([#&#8203;2202](https://redirect.github.com/prometheus/client_java/issues/2202))
([adeef32](https://redirect.github.com/prometheus/client_java/commit/adeef32f303a9dfadee9b7702b255db193c9c533))

##### Bug Fixes

- Avoid unnuecessary exemplar allocations
([#&#8203;2209](https://redirect.github.com/prometheus/client_java/issues/2209))
([0b6a91f](https://redirect.github.com/prometheus/client_java/commit/0b6a91f2bafe0fa15f6fe828f315103d8c20f9f9))
- **deps:** update spring boot to v4.1.0
([#&#8203;2213](https://redirect.github.com/prometheus/client_java/issues/2213))
([df25c08](https://redirect.github.com/prometheus/client_java/commit/df25c0821605b7edf7b87b9874a65d3d529592a5))

##### Documentation

- cover typed family descriptors and
[@&#8203;StableApi](https://redirect.github.com/StableApi) since v1.6.1
([#&#8203;2181](https://redirect.github.com/prometheus/client_java/issues/2181))
([7ca9f99](https://redirect.github.com/prometheus/client_java/commit/7ca9f99b8f1731315d2cf8f68247fc94174a8b3b))

</details>

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