Use a WordPressKit version that should fix the Reader loading issues

See how the UI tests failed in
https://buildkite.com/automattic/wordpress-ios/builds/20452#018dbe88-2fc5-4998-ad35-1b455f547b59

The WordPressKit PR is wordpress-mobile/WordPressKit-iOS#727

Podfile

@@ -51,7 +51,7 @@ end
 
 def wordpress_kit
   # pod 'WordPressKit', '~> 13.0'
-  pod 'WordPressKit', git: 'https://github.com/wordpress-mobile/WordPressKit-iOS.git', commit: 'ae8f83e5cffd14cc34cec863fc2d5c63e9658246'
+  pod 'WordPressKit', git: 'https://github.com/wordpress-mobile/WordPressKit-iOS.git', commit: '3df47e113c7647b76c049180e39489e3af7a27dc'
   # pod 'WordPressKit', git: 'https://github.com/wordpress-mobile/WordPressKit-iOS.git', branch: ''
   # pod 'WordPressKit', git: 'https://github.com/wordpress-mobile/WordPressKit-iOS.git', tag: ''
   # pod 'WordPressKit', path: '../WordPressKit-iOS'

Podfile.lock

@@ -120,7 +120,7 @@ DEPENDENCIES:
   - SwiftLint (~> 0.50)
   - WordPress-Editor-iOS (~> 1.19.9)
   - WordPressAuthenticator (from `https://github.com/wordpress-mobile/WordPressAuthenticator-iOS.git`, commit `fa06fca7178b268d382d91861752b3be0729e8a8`)
-  - WordPressKit (from `https://github.com/wordpress-mobile/WordPressKit-iOS.git`, commit `ae8f83e5cffd14cc34cec863fc2d5c63e9658246`)
+  - WordPressKit (from `https://github.com/wordpress-mobile/WordPressKit-iOS.git`, commit `3df47e113c7647b76c049180e39489e3af7a27dc`)
   - WordPressShared (~> 2.3)
   - WordPressUI (~> 1.15)
   - ZendeskSupportSDK (= 5.3.0)
@@ -178,7 +178,7 @@ EXTERNAL SOURCES:
     :commit: fa06fca7178b268d382d91861752b3be0729e8a8
     :git: https://github.com/wordpress-mobile/WordPressAuthenticator-iOS.git
   WordPressKit:
-    :commit: ae8f83e5cffd14cc34cec863fc2d5c63e9658246
+    :commit: 3df47e113c7647b76c049180e39489e3af7a27dc
     :git: https://github.com/wordpress-mobile/WordPressKit-iOS.git
 
 CHECKOUT OPTIONS:
@@ -189,7 +189,7 @@ CHECKOUT OPTIONS:
     :commit: fa06fca7178b268d382d91861752b3be0729e8a8
     :git: https://github.com/wordpress-mobile/WordPressAuthenticator-iOS.git
   WordPressKit:
-    :commit: ae8f83e5cffd14cc34cec863fc2d5c63e9658246
+    :commit: 3df47e113c7647b76c049180e39489e3af7a27dc
     :git: https://github.com/wordpress-mobile/WordPressKit-iOS.git
 
 SPEC CHECKSUMS:
@@ -236,6 +236,6 @@ SPEC CHECKSUMS:
   ZendeskSupportSDK: 3a8e508ab1d9dd22dc038df6c694466414e037ba
   ZIPFoundation: d170fa8e270b2a32bef9dcdcabff5b8f1a5deced
 
-PODFILE CHECKSUM: 951d83502d78264ef3f877d0472b009e53a61379
+PODFILE CHECKSUM: f732e6e39fc98112f1812c770b6bb5daf5a73672
 
 COCOAPODS: 1.14.2