[AUTOMATIC] iOS 5.85.0 => 5.86.0 (#1840)

[AUTOMATIC] iOS 5.85.0 => 5.86.0

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---

> [!NOTE]
> **Low Risk**
> Version-pin-only update with no application logic changes; risk is
limited to whatever changed in upstream RevenueCat 5.86.0.
> 
> **Overview**
> Bumps the pinned **RevenueCat iOS SDK** from **5.85.0** to **5.86.0**
across SPM, CocoaPods, and the iOS example `Podfile`.
> 
> **Swift Package Manager:** `Package.swift` uses `exact: "5.86.0"` and
`Package.resolved` records the new revision for `purchases-ios-spm`.
> 
> **CocoaPods:** `PurchasesHybridCommon` depends on `RevenueCat`
**5.86.0**; `PurchasesHybridCommonUI` depends on `RevenueCatUI`
**5.86.0**. `Podfile` / `Podfile.lock` are updated for local targets and
tests.
> 
> No hybrid-common Swift/ObjC sources change in this PR—only dependency
pins and lockfiles.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
fbb5e194841061a2d0e557cf69b07a81ed25e17d. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
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