Update dependency Kingfisher to ~> 8.1.0

| datasource | package    | from  | to    |
| ---------- | ---------- | ----- | ----- |
| pod        | Kingfisher | 8.0.3 | 8.1.0 |

Author: renovate[bot]

sample/iosApp/Podfile

@@ -4,14 +4,14 @@ target 'iosApp' do
   use_frameworks!
   platform :ios, '15.0'
   pod 'shared', :path => '../shared'
-  pod 'Kingfisher', '~> 8.0.0'
+  pod 'Kingfisher', '~> 8.1.0'
 end
 
 target 'iosApp-RxSwift' do
   use_frameworks!
   platform :ios, '15.0'
   pod 'shared', :path => '../shared'
-  pod 'Kingfisher', '~> 8.0.0'
+  pod 'Kingfisher', '~> 8.1.0'
   pod 'RxSwift', '~> 6.7.0'
   pod 'RxCocoa', '~> 6.7.0'
   pod 'RxRelay', '~> 6.7.0'