chore(deps): update dependency gradle to v8.7 (#4333)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [gradle](https://gradle.org)
([source](https://togithub.com/gradle/gradle)) | minor | `8.6` -> `8.7`
|

---

### Release Notes

<details>
<summary>gradle/gradle (gradle)</summary>

### [`v8.7`](https://togithub.com/gradle/gradle/compare/v8.6.0...v8.7.0)

[Compare
Source](https://togithub.com/gradle/gradle/compare/v8.6.0...v8.7.0)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/tuskyapp/Tusky).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4yNjEuMCIsInVwZGF0ZWRJblZlciI6IjM3LjI2MS4wIiwidGFyZ2V0QnJhbmNoIjoiZGV2ZWxvcCJ9-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME